Encycolorpedia

Sigma Sienna Brown / 8002 / #7c5949 Hex Color Code

#7c5949 Paint ChipThe hexadecimal color code #7c5949 is a medium dark shade of red-orange. In the RGB color model #7c5949 is comprised of 48.63% red, 34.9% green and 28.63% blue. In the HSL color space #7c5949 has a hue of 19° (degrees), 26% saturation and 39% lightness. This color has an approximate wavelength of 589.23 nm.

Color Variations

Related Named Colors

Color Schemes

Download: GIMP GPL Adobe ASE (Adobe Swatch Exchange) Sketch Palette

#7c5949 linear gradient to complementary #3a778b

  1. #7c5949
  2. #765e54
  3. #6f635f
  4. #66686a
  5. #5b6d75
  6. #4d7280
  7. #3a778b

Monochromatic Colors

  1. #694839
  2. #704e3e
  3. #765343
  4. #7c5949
  5. #825f4f
  6. #896554
  7. #8f6b5a

Tints and Shades

#7c5949 to white

  1. #7c5949
  2. #927365
  3. #a88d81
  4. #bda89f
  5. #d3c5be
  6. #e9e1de
  7. #ffffff / #fff

#7c5949 to black

  1. #7c5949
  2. #674a3d
  3. #523c32
  4. #3e2e27
  5. #2b211c
  6. #1a1411
  7. #000000 / #000

Paints

Exact Matching Paints

Similar Paints

  1. Dunn-Edwards

    1. ★ Burns Cave / 505
      #7b5847
      ΔE = 0.598 / LRV ≈ 11.6%
    2. Hope Chest / 621
      #875942
      ΔE = 4.097 / LRV ≈ 12.7%
  2. Kansai Paint

    1. ★ Brick Red
      #785747
      ΔE = 1.176 / LRV ≈ 11.3%
    2. Copper Leaf
      #795040
      ΔE = 3.502 / LRV ≈ 10.2%
  3. Sto

    1. ★ 32342
      #7a5647
      ΔE = 1.212 / LRV ≈ 11.2%
    2. 32130
      #745f4a
      ΔE = 5.168 / LRV ≈ 12.4%
  4. Brighto Paints

    1. ★ 6815 Warm Touch
      #7e5c4d
      ΔE = 1.236 / LRV ≈ 12.6%
    2. 6222 Choclate
      #795d4c
      ΔE = 2.351 / LRV ≈ 12.4%
  5. Colortrend

    1. ★ 0151
      #78584a
      ΔE = 1.277 / LRV ≈ 11.5%
    2. ★ Burnt Umber
      #7d5c4e
      ΔE = 1.419 / LRV ≈ 12.6%
  6. Cloverdale Paint

    1. ★ Soul Of The Earth / 8597
      #7a5a4d
      ΔE = 1.407 / LRV ≈ 12.0%
    2. Western Pursuit / 8581
      #84624d
      ΔE = 3.963 / LRV ≈ 14.2%
  7. General Paint

    1. ★ Oak Gall / CL 2616N
      #7b5b4e
      ΔE = 1.516 / LRV ≈ 12.2%
    2. Espresso / CL 2677N
      #6f5846
      ΔE = 4.220 / LRV ≈ 10.8%
  8. GM / General Motors

    1. ★ Cedarbird Brown
      #78584b
      ΔE = 1.531 / LRV ≈ 11.5%
    2. Light Saddle
      #734f3a
      ΔE = 4.602 / LRV ≈ 9.5%
  9. PPG Pittsburgh Paints

    1. ★ Spiced Cinnamon / PPG1071-7
      #805b48
      ΔE = 1.564 / LRV ≈ 12.5%
    2. Bigfoot / PPG1061-7
      #715145
      ΔE = 3.894 / LRV ≈ 9.8%
  10. California Paints

    1. ★ DE 6084 - Roxy Brown
      #7a5546
      ΔE = 1.582 / LRV ≈ 11.1%
    2. DE 6056 - Buffalo Herd
      #705046
      ΔE = 4.602 / LRV ≈ 9.6%
  11. RAL

    1. ★ RAL 050 40 20
      #7a5544
      ΔE = 1.598 / LRV ≈ 11.1%
    2. RAL 330-3
      #794e3e
      ΔE = 4.313 / LRV ≈ 9.9%
  12. Behr

    1. ★ Canterbury Woods PEC-39
      #795b4a
      ΔE = 1.615 / LRV ≈ 12.0%
    2. Earth Fired Red S200-7
      #785241
      ΔE = 2.735 / LRV ≈ 10.4%
  13. Clark+Kensington

    1. ★ Morning Coffee / N-W24
      #765647
      ΔE = 1.754 / LRV ≈ 11.0%
    2. Catalina Mountains / WNCC-12
      #7c6455
      ΔE = 4.636 / LRV ≈ 14.1%
  14. Crown Paint

    1. ★ Chocolate Brown
      #805a46
      ΔE = 1.813 / LRV ≈ 12.3%
    2. Cafetiere
      #725048
      ΔE = 4.909 / LRV ≈ 9.8%
  15. Crown Diamond

    1. ★ 7374-73 Bronze Figurine
      #775a4d
      ΔE = 1.950 / LRV ≈ 11.8%
    2. 7373-73 Bear Paw
      #71564d
      ΔE = 3.887 / LRV ≈ 10.7%
  16. Jotun

    1. ★ 0529 / Terra
      #7e5d4a
      ΔE = 1.951 / LRV ≈ 12.8%
    2. 0026 / Hassel
      #6d5446
      ΔE = 4.190 / LRV ≈ 10.0%
  17. Nerolac

    1. ★ Kitty Kat - 2798
      #825c49
      ΔE = 1.990 / LRV ≈ 12.9%
    2. Today's Brew - 4477
      #805e46
      ΔE = 3.622 / LRV ≈ 13.0%
  18. Wattyl

    1. ★ Bobby Brown / B72W
      #795c4a
      ΔE = 2.151 / LRV ≈ 12.2%
  19. New Look

    1. ★ Pride Rock / B09-03
      #795c4a
      ΔE = 2.151 / LRV ≈ 12.2%
    2. Mocha Obsession / G32-04
      #825b52
      ΔE = 3.577 / LRV ≈ 12.8%
  20. Opaltone / OMS

    1. ★ 4216
      #7a5b47
      ΔE = 2.173 / LRV ≈ 12.1%
    2. 4215
      #7a5f57
      ΔE = 4.175 / LRV ≈ 13.0%
  21. Humbrol

    1. 186 Brown
      #7f5f50
      ΔE = 2.336 / LRV ≈ 13.3%
    2. 98 Chocolate
      #715e50
      ΔE = 4.676 / LRV ≈ 12.1%
  22. Taubmans

    1. Chocolate Drop / T12 24.G12
      #815f4f
      ΔE = 2.347 / LRV ≈ 13.4%
    2. Medieval Brown / T12 28.H12
      #7b574f
      ΔE = 3.479 / LRV ≈ 11.6%
  23. Scib Paints

    1. Mocha Java / 8646
      #7f5f51
      ΔE = 2.443 / LRV ≈ 13.3%
    2. Western Pursuit / 8581
      #7c5539
      ΔE = 4.912 / LRV ≈ 11.1%
  24. Vista Paint

    1. Mocha Java
      #7f5f51
      ΔE = 2.443 / LRV ≈ 13.3%
    2. Terrazzo
      #8a5f47
      ΔE = 4.731 / LRV ≈ 14.0%
  25. Jedynka

    1. Mókuscsemege
      #775c4b
      ΔE = 2.506 / LRV ≈ 12.1%
  26. Pantone / PMS

    1. 18-1229 TCX
      #855c4c
      ΔE = 2.509 / LRV ≈ 13.2%
    2. 7518
      #704f45
      ΔE = 4.841 / LRV ≈ 9.5%
  27. Evonik-Degussa

    1. 134A Bedford
      #755643
      ΔE = 2.518 / LRV ≈ 10.8%
    2. 4143D Revival Mahogany
      #805b52
      ΔE = 3.315 / LRV ≈ 12.7%
  28. Testors

    1. Testors 1133
      #815d48
      ΔE = 2.519 / LRV ≈ 13.0%
  29. Asian Paints

    1. Nut Brown-N / 419
      #745446
      ΔE = 2.546 / LRV ≈ 10.5%
    2. Rich Chocolate / 8645
      #6b5144
      ΔE = 4.938 / LRV ≈ 9.4%
  30. Olympic

    1. Chocolate Curl D25-5
      #735849
      ΔE = 2.601 / LRV ≈ 11.1%
    2. Wine Barrel C25-6
      #774d3f
      ΔE = 4.675 / LRV ≈ 9.6%
  31. Peintures MF

    1. BORA BORA
      #7d5b51
      ΔE = 2.656 / LRV ≈ 12.4%
    2. BD214-5
      #705545
      ΔE = 3.415 / LRV ≈ 10.4%
  32. Dulux Australia

    1. Iron Brown / G42
      #735444
      ΔE = 2.725 / LRV ≈ 10.4%
    2. Havana / A131
      #775e53
      ΔE = 3.413 / LRV ≈ 12.6%
  33. Porter Paints

    1. Chocolate Kiss / 423-7
      #745643
      ΔE = 2.766 / LRV ≈ 10.8%
    2. Chocolate Truffle / 523-7
      #705746
      ΔE = 3.613 / LRV ≈ 10.7%
  34. Dutch Boy

    1. Nutwood
      #835b45
      ΔE = 2.857 / LRV ≈ 12.7%
    2. Toffee Bar
      #7c6152
      ΔE = 3.367 / LRV ≈ 13.4%
  35. Duron

    1. Rookwood Medium Brown
      #79553f
      ΔE = 2.920 / LRV ≈ 10.9%
    2. Grounded
      #85604d
      ΔE = 3.199 / LRV ≈ 13.9%
  36. ICI Paints

    1. Cottage Chocolate 70YR 13/140
      #715648
      ΔE = 3.068 / LRV ≈ 10.6%
    2. Bryce Lodge 70YR 11/173
      #6e5041
      ΔE = 4.434 / LRV ≈ 9.4%
  37. Federal Standard

    1. Federal Standard 30111
      #7d5b52
      ΔE = 3.078 / LRV ≈ 12.5%
    2. Federal Standard 30108
      #6c5447
      ΔE = 4.472 / LRV ≈ 10.0%
  38. Krylon

    1. Equestrian
      #715748
      ΔE = 3.117 / LRV ≈ 10.8%
    2. Brown Boots
      #7b583e
      ΔE = 3.968 / LRV ≈ 11.5%
  39. Bristol

    1. Eclair / P175-N7
      #755540
      ΔE = 3.126 / LRV ≈ 10.6%
    2. Rich Gravy / P175-N6
      #86644f
      ΔE = 4.667 / LRV ≈ 14.7%
  40. Mylands of London

    1. Leather
      #846052
      ΔE = 3.130 / LRV ≈ 13.9%
    2. Dark Coffee
      #795c56
      ΔE = 4.470 / LRV ≈ 12.4%
  41. Coronado Paint

    1. 8581 - Western Pursuit
      #78543e
      ΔE = 3.178 / LRV ≈ 10.7%
    2. 8565 - Pinecone Path
      #7f5a40
      ΔE = 3.873 / LRV ≈ 12.2%
  42. Farrow & Ball

    1. London Clay / 244
      #715444
      ΔE = 3.200 / LRV ≈ 10.3%
  43. Chrysler

    1. Burma Tan
      #78563f
      ΔE = 3.225 / LRV ≈ 11.0%
    2. Medium Tundra
      #746050
      ΔE = 4.696 / LRV ≈ 12.7%
  44. Graham & Brown

    1. Henry's Brown
      #7c6054
      ΔE = 3.260 / LRV ≈ 13.3%
  45. Devoe Paint

    1. Cottage Chocolate / 70YR 13/140
      #7a6050
      ΔE = 3.280 / LRV ≈ 13.1%
    2. Tobacco Brown / 50YR 10/151
      #6f5245
      ΔE = 3.931 / LRV ≈ 9.8%
  46. Glidden

    1. Spicewood Brown / 50YR 13/139
      #7a5e54
      ΔE = 3.286 / LRV ≈ 12.8%
    2. Caramelized Walnut / PPG1074-6
      #6e564a
      ΔE = 3.999 / LRV ≈ 10.5%
  47. Plascon

    1. Chikadee O5-E1-3
      #745c50
      ΔE = 3.298 / LRV ≈ 11.9%
    2. Little John O2-E1-3
      #705448
      ΔE = 3.572 / LRV ≈ 10.3%
  48. Caparol

    1. 17S 2 / Oxidbraun 17S 2
      #745c50
      ΔE = 3.298 / LRV ≈ 11.9%
    2. 1720
      #88584c
      ΔE = 4.252 / LRV ≈ 12.7%
  49. Teknos

    1. GG410
      #7f533f
      ΔE = 3.339 / LRV ≈ 11.1%
    2. GBI156
      #806554
      ΔE = 4.717 / LRV ≈ 14.5%
  50. Focoltone

    1. 6023
      #785c53
      ΔE = 3.349 / LRV ≈ 12.3%
    2. 2188
      #765338
      ΔE = 5.109 / LRV ≈ 10.3%
  51. Volkswagen

    1. Sudan Brown
      #7a563e
      ΔE = 3.410 / LRV ≈ 11.1%
  52. Tikkurila

    1. L475 / Jasper
      #845649
      ΔE = 3.436 / LRV ≈ 12.0%
    2. 2664 / Joukahainen
      #715146
      ΔE = 4.058 / LRV ≈ 9.8%
  53. Resene

    1. Double Otter BR53-028-053
      #796053
      ΔE = 3.495 / LRV ≈ 13.1%
    2. Pickled Bean WW18
      #73553e
      ΔE = 4.117 / LRV ≈ 10.5%
  54. Natural Color System / NCS

    1. S 6010-Y30R
      #725642
      ΔE = 3.532 / LRV ≈ 10.6%
    2. S 5010-Y70R
      #856054
      ΔE = 3.649 / LRV ≈ 14.0%
  55. Sico

    1. 6190-73 Chocolate Truffle
      #81604a
      ΔE = 3.535 / LRV ≈ 13.5%
    2. 6082-73 Masqued Ball
      #79514b
      ΔE = 5.211 / LRV ≈ 10.5%
  56. Model Master

    1. Model Master 1785
      #745042
      ΔE = 3.635 / LRV ≈ 9.8%
  57. Tollens

    1. T2161-5
      #865943
      ΔE = 3.640 / LRV ≈ 12.6%
    2. T2155-3
      #7c6256
      ΔE = 3.994 / LRV ≈ 13.7%
  58. KILZ

    1. Toasty / D522
      #865c45
      ΔE = 3.648 / LRV ≈ 13.2%
    2. Legendary / C501
      #7f5e58
      ΔE = 4.756 / LRV ≈ 13.2%
  59. Rodda Paint

    1. Wooden Nutmeg H139
      #735c51
      ΔE = 3.672 / LRV ≈ 11.9%
    2. Hickory Nut H137
      #75604c
      ΔE = 5.042 / LRV ≈ 12.7%
  60. Caran d'Ache

    1. 548 Raw Umber
      #7d6252
      ΔE = 3.685 / LRV ≈ 13.7%
  61. Benjamin Moore

    1. Coconut Grove / 1029
      #785f4c
      ΔE = 3.700 / LRV ≈ 12.7%
    2. Cowboy Boots / 1015
      #7f6456
      ΔE = 4.363 / LRV ≈ 14.3%
  62. British Standard

    1. BS381 411 - Middle brown
      #73533e
      ΔE = 3.728 / LRV ≈ 10.2%
    2. BS 2660 BS 3-045 - Middle brown
      #77553c
      ΔE = 4.115 / LRV ≈ 10.7%
  63. Earthpaint

    1. 5-4-5 Muddy Paws
      #876053
      ΔE = 3.779 / LRV ≈ 14.1%
    2. 5-11-6 Sparrow
      #745c44
      ΔE = 5.040 / LRV ≈ 11.8%
  64. Levis

    1. Full Plum
      #785851
      ΔE = 3.858 / LRV ≈ 11.6%
    2. Full Umber
      #76503a
      ΔE = 4.315 / LRV ≈ 9.9%
  65. Sherwin-Williams

    1. Canyon Clay - 6054
      #85594f
      ΔE = 3.878 / LRV ≈ 12.7%
    2. Hot Cocoa - 6047
      #806257
      ΔE = 4.019 / LRV ≈ 14.0%
  66. Pratt & Lambert

    1. Congo Brown 7-18
      #705141
      ΔE = 3.880 / LRV ≈ 9.7%
    2. Dunsmuir 11-19
      #70573f
      ΔE = 5.219 / LRV ≈ 10.6%
  67. AMC

    1. Bronze Mist
      #7a5b42
      ΔE = 3.915 / LRV ≈ 12.0%
    2. Caballero Medium Tan
      #765d47
      ΔE = 4.231 / LRV ≈ 12.1%
  68. CIL

    1. Otter Brook
      #6f5848
      ΔE = 3.939 / LRV ≈ 10.8%
    2. Timber Trail
      #74543a
      ΔE = 4.925 / LRV ≈ 10.4%
  69. Vallejo

    1. Vallejo 70.843 #133
      #7f6355
      ΔE = 3.964 / LRV ≈ 14.1%
    2. Vallejo 70.874 #134
      #766055
      ΔE = 4.242 / LRV ≈ 12.9%
  70. Kelly-Moore

    1. Western Brown SSSC / 1285-602
      #83583f
      ΔE = 4.003 / LRV ≈ 12.2%
    2. Mochaccino / KM4048-5
      #89644d
      ΔE = 5.197 / LRV ≈ 15.0%
  71. Ford

    1. Medium Champagne
      #79604c
      ΔE = 4.061 / LRV ≈ 13.0%
    2. Bali Bronze
      #745b55
      ΔE = 4.723 / LRV ≈ 11.9%
  72. Dulux

    1. 70YR 13/259
      #875c44
      ΔE = 4.089 / LRV ≈ 13.2%
    2. Chocolate Fondant
      #6c5043
      ΔE = 4.866 / LRV ≈ 9.3%
  73. Sigma

    1. Sienna Brown / FS068
      #875c52
      ΔE = 4.168 / LRV ≈ 13.4%
    2. Sienna Brown / S 5030-Y70R
      #8d5f4d
      ΔE = 4.695 / LRV ≈ 14.4%
  74. Nippon Paint

    1. Sable Brown / NP N 1876 A
      #865c43
      ΔE = 4.185 / LRV ≈ 13.1%
    2. Red Earth / NP R 1379 A
      #795149
      ΔE = 4.535 / LRV ≈ 10.4%
  75. Sikkens

    1. C5.27.28
      #7d5147
      ΔE = 4.266 / LRV ≈ 10.7%
    2. C3.14.31
      #765b55
      ΔE = 4.535 / LRV ≈ 12.0%
  76. Ralph Lauren

    1. Rufford Hall / RLTH211
      #71543e
      ΔE = 4.310 / LRV ≈ 10.2%
    2. Tapestry / RLNA204
      #87593f
      ΔE = 4.853 / LRV ≈ 12.7%
  77. Diamond Vogel

    1. Hanover Brick / H135
      #885d53
      ΔE = 4.396 / LRV ≈ 13.7%
    2. Valentino / 0046
      #845246
      ΔE = 4.741 / LRV ≈ 11.4%
  78. Dupont

    1. CAS814
      #6f5b4d
      ΔE = 4.404 / LRV ≈ 11.4%
  79. Toyo Ink

    1. CF10823
      #896351
      ΔE = 4.412 / LRV ≈ 14.8%
  80. TRUMATCH

    1. 50-c4
      #83533d
      ΔE = 4.455 / LRV ≈ 11.3%
    2. 50-d5
      #8b6453
      ΔE = 4.943 / LRV ≈ 15.2%
  81. Brillux

    1. 24.09.24
      #7d5650
      ΔE = 4.551 / LRV ≈ 11.6%
    2. 12.09.24
      #765d45
      ΔE = 4.801 / LRV ≈ 12.1%
  82. Homebase

    1. Charcoal Grey
      #6f5c50
      ΔE = 4.641 / LRV ≈ 11.6%
  83. Valspar Paint

    1. Potter's Rock
      #89634e
      ΔE = 4.657 / LRV ≈ 14.8%
    2. Brooklyn Brownstone
      #785f47
      ΔE = 4.933 / LRV ≈ 12.6%
  84. Reaper Master

    1. Dark Highlight (9042)
      #6d5044
      ΔE = 4.747 / LRV ≈ 9.4%
  85. Old Citadel

    1. Calthan Brown
      #6d5044
      ΔE = 4.747 / LRV ≈ 9.4%
  86. Vallejo Game Color

    1. Heavy Siena (154)
      #6d5044
      ΔE = 4.747 / LRV ≈ 9.4%
  87. Vallejo Model Color

    1. Flat Brown (984)
      #6d5044
      ΔE = 4.747 / LRV ≈ 9.4%
  88. Berger

    1. Western Pursuit / 8581
      #7c5539
      ΔE = 4.912 / LRV ≈ 11.1%
    2. Soul of the earth / 8597
      #714c3b
      ΔE = 5.204 / LRV ≈ 9.0%
  89. RVI

    1. Beige / 01152
      #7e5539
      ΔE = 4.970 / LRV ≈ 11.2%
  90. 1829

    1. Mortlake Brown
      #836654
      ΔE = 5.036 / LRV ≈ 15.0%
  91. Australian Standard AS2700

    1. X62 Dark Earth
      #6e5d51
      ΔE = 5.205 / LRV ≈ 11.7%

Color Blindness Simulation

Monochromacy

Dichromacy

Trichromacy

#7c5949 HTML / CSS Code Examples

#7c5949 foreground

The world of reality has its limits; the world of imagination is boundless.

Jean-Jacques Rousseau
<p style="color: #7c5949">…</p>

#7c5949 background

I found I could say things with color and shapes that I couldn't say any other way--things I had no words for.

Georgia O'Keeffe
<p style="background-color: #7c5949">…</p>

#7c5949 shadow

No great artist ever sees things as they really are. If he did, he would cease to be an artist.

Oscar Wilde
<p style="text-shadow: 0.1em 0.1em 0.15em #7c5949">…</p>

Color Charts

Color Space Conversions

Decimal
8149321
Binary
01111100, 01011001, 01001001
Hexadecimal
#7c5949
LRV
≈ 11.9%
Closest short hex
#754 ΔE = 1.847
RGB
rgb(124, 89, 73)
RGBA
rgba(124, 89, 73, 1.0)
rg chromaticity
r: 0.434, g: 0.311, b: 0.255
RYB
red: 48.627%, yellow: 37.770%, blue: 28.627%
Android / android.graphics.Color
-8627895 / 0xff7c5949
HSL
hsl(19, 26%, 39%)
HSLA
hsla(19, 26%, 39%, 1.0)
HSV / HSB
hue: 19° (18.824), saturation: 41% (0.411), value: 49% (0.486)
HSP
hue: 18.824, saturation: 41.129%, perceived brightness: 38.929%
HSLuv (HUSL)
H: 32.874, S: 40.578, L: 41.075
Cubehelix
H: 12.500, S: 0.308, L: 0.383
TSL
T: 3.559, S: 0.138, L: 0.383
CMYK
cyan: 0% (0.000), magenta: 28% (0.282), yellow: 41% (0.411), key: 51% (0.514)
CMY
cyan: 51% (0.514), magenta: 65% (0.651), yellow: 71% (0.714)
XYZ
X: 13.088, Y: 11.912, Z: 7.912
xyY
x: 0.398, y: 0.362, Y: 11.912
CIELab
L: 41.075, a: 12.178, b: 14.948
CIELuv
L: 41.075, u: 24.076, v: 15.560
CIELCH / LCHab
L: 41.075, C: 19.280, H: 50.830
CIELUV / LCHuv
L: 41.075, C: 28.666, H: 32.874
Hunter-Lab
L: 34.513, a: 7.290, b: 10.568
CIECAM02
J: 31.871, C: 19.146, h: 44.922, Q: 111.227, M: 16.743, s: 38.798, H: 32.480
OSA-UCS
lightness: -9.995, jaune: 2.120, green: -2.053
LMS
L: 13.423, M: 11.060, S: 7.982
YCbCr
Y: 99.878, Cb: 115.796, Cr: 144.501
YCoCg
Y: 93.750, Cg: -4.750, Co: 43.750
YDbDr
Y: 97.641, Db: -37.078, Dr: -50.127
YPbPr
Y: 95.303, Pb: -12.025, Pr: 18.236
xvYCC
Y: 97.848, Cb: 117.437, Cr: 144.019
YIQ
Y: 97.641, I: 25.990, Q: 2.423
YUV
Y: 97.641, U: -12.125, V: 23.125
Munsell Color System
5YR 4/4 ΔE = 2.426
Brand Color
Quora ΔE = 13.218

Random Colors

Red

Green

Blue