The hexadecimal color code #abbcac is a medium light shade of green. In the RGB color model #abbcac is comprised of 67.06% red, 73.73% green and 67.45% blue. In the HSL color space #abbcac has a hue of 124° (degrees), 11% saturation and 70% lightness. This color has an approximate wavelength of 547 nm.
There is no must in art because art is free.
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To send light into the darkness of men's hearts - such is the duty of the artist.
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To practice any art, no matter how well or badly, is a way to make your soul grow. So do it.
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