The numcolors command returns the number of indexable colors in a Palette object when it was created before any automatic palette expansion.

The numelems command returns the number of colors in a Palette object including any colors added during automatic palette expansion.

$P≔\mathrm{ColorTools}:-\mathrm{GetPalette}\left(''spring''\right)$

$P≔⟨Palette\; Spring:BlueRoseYellowGreenBlueGreenVioletCobaltYellowPurpleRedGreenBluePaleGreenOrangePurpleGreenSeaBluePaleYellowPaleBlueGreen⟩$

$\mathrm{numcolors}\left(P\right)$

$16$

$\mathrm{numelems}\left(P\right)$

$16$

$P\left[\mathrm{numcolors}\left(P\right)+10\right]$

$⟨RGB\; :\; 0.417\; 0.453\; 0.12⟩$

$\mathrm{numcolors}\left(P\right)$

$16$

$\mathrm{numelems}\left(P\right)$

$27$

The ColorTools[Palette][numcolors] and ColorTools[Palette][numelems] commands were introduced in Maple 16.

For more information on Maple 16 changes, see Updates in Maple 16.