#645A87

RGB 100, 90, 135

Values

Hex#645A87

RGB100, 90, 135

HSL253°, 20%, 44%

On White6.26:1

On Black3.35:1

#E6E8E3 background

#203319 ink

#645A87 accent

#6C2395 support

#AFAA8E neutral

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Use these colors:

Background: #E6E8E3 (background)
Ink: #203319 (ink)
Accent: #645A87 (accent)
Support: #6C2395 (support)
Neutral: #AFAA8E (neutral)

Build a design system around this color.