#644D8F

RGB 100, 77, 143

Values

Hex#644D8F

RGB100, 77, 143

HSL261°, 30%, 43%

On White7:1

On Black3:1

#F8F9F6 background

#172117 ink

#644D8F accent

#83378B support

#BABB96 neutral

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Use these colors:

Background: #F8F9F6 (background)
Ink: #172117 (ink)
Accent: #644D8F (accent)
Support: #83378B (support)
Neutral: #BABB96 (neutral)

Build a design system around this color.