9 colors
oklch(0.98 0.001 240)
oklch(0.94 0.002 240)
oklch(0.9 0.003 240)
oklch(0.85 0.004 240)
oklch(0.75 0.005 240)
oklch(0.54 0.006 240)
oklch(0.4 0.005 240)
oklch(0.3 0.004 240)
oklch(0.2 0.003 240)