#645F9B

RGB 100, 95, 155

Values

Hex#645F9B

RGB100, 95, 155

HSL245°, 24%, 49%

On White5.75:1

On Black3.65:1

#EFEFEB background

#2B3E23 ink

#645F9B accent

#7D668A support

#C1BFBD neutral

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Use these colors:

Background: #EFEFEB (background)
Ink: #2B3E23 (ink)
Accent: #645F9B (accent)
Support: #7D668A (support)
Neutral: #C1BFBD (neutral)

Build a design system around this color.