#645699

RGB 100, 86, 153

Values

Hex#645699

RGB100, 86, 153

HSL253°, 28%, 47%

On White6.3:1

On Black3.33:1

#ECEEE7 background

#112310 ink

#645699 accent

#6C3D8A support

#B4AB8E neutral

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Use these colors:

Background: #ECEEE7 (background)
Ink: #112310 (ink)
Accent: #645699 (accent)
Support: #6C3D8A (support)
Neutral: #B4AB8E (neutral)

Build a design system around this color.