#643F9D

RGB 100, 63, 157

Values

Hex#643F9D

RGB100, 63, 157

HSL264°, 43%, 43%

On White7.66:1

On Black2.74:1

#E8E9E7 background

#283922 ink

#643F9D accent

#8720A7 support

#C0C190 neutral

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Use these colors:

Background: #E8E9E7 (background)
Ink: #283922 (ink)
Accent: #643F9D (accent)
Support: #8720A7 (support)
Neutral: #C0C190 (neutral)

Build a design system around this color.