The Adjust command creates a new Color structure which has the same hue as the input color, but with altered lightness and/or saturation. It uses the cylindrical perceptual color space LCH to make the adjustment and then projects back to a displayable color in the original colorspace unless the raw option is given.

Contrast this command with the quartet of Lighten, Darken, Saturate, and Desaturate which use the HSV non-perceptual colorspace.

$\mathrm{with}\left(\mathrm{ColorTools}\right)\:$

$\mathrm{Adjust}\left(''DarkRed''\,\mathrm{lightness}=15\right)::\mathrm{Lighten}\left(''DarkRed''\,1.5\right)$

$\left(⟨RGB\; :\; 0.771\; 0.204\; 0.129⟩\right)::\left(⟨RGB\; :\; 0.818\; 0\; 0⟩\right)$

$\mathrm{Adjust}\left(''DarkRed''\,\mathrm{lightness}=-15\right)::\mathrm{Darken}\left(''DarkRed''\,1.5\right)$

$\left(⟨RGB\; :\; 0.191\; 0.00669\; 0.00226⟩\right)::\left(⟨RGB\; :\; 0.363\; 0\; 0⟩\right)$

$\mathrm{Adjust}\left(''DarkRed''\,\mathrm{lightness}=45\,\mathrm{raw}\right)::\mathrm{Adjust}\left(''DarkRed''\,\mathrm{lightness}=45\right)$

$\left(⟨*RGB*\; :\; 1.14\; 0.476\; 0.362⟩\right)::\left(⟨RGB\; :\; 1\; 0.572\; 0.488⟩\right)$

$\mathrm{Adjust}\left(''DarkRed''\,\mathrm{chroma}=15\right)::\mathrm{Saturate}\left(''DarkRed''\,1.5\right)$

$\left(⟨RGB\; :\; 0.538\; 0.00956\; 0.00309⟩\right)::\left(⟨RGB\; :\; 0.545\; 0\; 0⟩\right)$

$\mathrm{Adjust}\left(''DarkRed''\,\mathrm{chroma}=-15\right)::\mathrm{Desaturate}\left(''DarkRed''\,1.5\right)$

$\left(⟨RGB\; :\; 0.512\; 0.108\; 0.0582⟩\right)::\left(⟨RGB\; :\; 0.545\; 0.182\; 0.182⟩\right)$

$\mathrm{Adjust}\left(''DarkRed''\,\mathrm{chroma}=15\,\mathrm{raw}\right)::\mathrm{Adjust}\left(''DarkRed''\,\mathrm{chroma}=15\right)$

$\left(⟨*RGB*\; :\; 0.573\; -0.134\; -0.0315⟩\right)::\left(⟨RGB\; :\; 0.538\; 0.00956\; 0.00309⟩\right)$

The ColorTools[Adjust] command was introduced in Maple 18.

For more information on Maple 18 changes, see Updates in Maple 18.