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.

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

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

$\left(⟨RGB\; :\; 0.726\; 0.217\; 0.139⟩\right)::\left(⟨RGB\; :\; 0.818\; 0\; 0⟩\right)$

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

$\left(⟨RGB\; :\; 0.393\; 0.0447\; 0⟩\right)::\left(⟨RGB\; :\; 0.363\; 0\; 0⟩\right)$

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

$\left(⟨*RGB*\; :\; 1.1\; 0.538\; 0.419⟩\right)::\left(⟨RGB\; :\; 0.992\; 0.616\; 0.527⟩\right)$

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

$\left(⟨RGB\; :\; 0.582\; 0.0787\; 0.0399⟩\right)::\left(⟨RGB\; :\; 0.545\; 0\; 0⟩\right)$

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

$\left(⟨RGB\; :\; 0.492\; 0.126\; 0.0727⟩\right)::\left(⟨RGB\; :\; 0.545\; 0.182\; 0.182⟩\right)$

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

$\left(⟨*RGB*\; :\; 0.596\; -0.207\; -0.0785⟩\right)::\left(⟨RGB\; :\; 0.582\; 0.0787\; 0.0399⟩\right)$

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

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