#645699

RGB 100, 86, 153

Values

Hex#645699

RGB100, 86, 153

HSL253°, 28%, 47%

On White6.3:1

On Black3.33:1

#E4E5E1 background

#22311C ink

#645699 accent

#9D1FB2 support

#BCAB94 neutral

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Use these colors:

Background: #E4E5E1 (background)
Ink: #22311C (ink)
Accent: #645699 (accent)
Support: #9D1FB2 (support)
Neutral: #BCAB94 (neutral)

Build a design system around this color.