#643D9E

RGB 100, 61, 158

Values

Hex#643D9E

RGB100, 61, 158

HSL264°, 44%, 43%

On White7.77:1

On Black2.7:1

#E8EBE5 background

#101910 ink

#643D9E accent

#774A7D support

#ACAC9A neutral

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Use these colors:

Background: #E8EBE5 (background)
Ink: #101910 (ink)
Accent: #643D9E (accent)
Support: #774A7D (support)
Neutral: #ACAC9A (neutral)

Build a design system around this color.