Summary

interpolateColors() currently only supports legacy CSS color formats:

• Hex (#rgb, #rgba, #rrggbb, #rrggbbaa)
• rgb() / rgba()
• hsl() / hsla()
• CSS named colors

We should also accept:

• oklch()
• oklab()
• lab()
• lch()
• color() (e.g. color(display-p3 1 0 0))
• hwb()