#645A8C

RGB 100, 90, 140

Values

Hex#645A8C

RGB100, 90, 140

HSL252°, 22%, 45%

On White6.21:1

On Black3.38:1

#E4E4E2 background

#22331E ink

#645A8C accent

#A559C5 support

#CDC9AC neutral

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Use these colors:

Background: #E4E4E2 (background)
Ink: #22331E (ink)
Accent: #645A8C (accent)
Support: #A559C5 (support)
Neutral: #CDC9AC (neutral)

Build a design system around this color.