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To be honest you probably could narrow down the color palette down a lot
>Primary/Secondary colors (Red orange yellow green blue and purple)
>Tertiary colors (Yellow orange, Lime green, turquoise)
>Grayscale (Black, white, dark and light gray)
>Tints (Pink, light blue)
>Shades (Dark red, dark green, dark blue)
>Nature colors (Brown, tan, medium flesh, olive green)
>Metallics (Pearl gold, flat silver)
>Transparents (Trans clear/black/red/orange/yellow/green/blue/purple)
>Glow in the dark
That's 33 colors total, and if you're really anal you can cut the tertiary colors and go down to 30 colors total. At the very least you should have COLOR and DARK COLOR in the palette.