#645D98

RGB 100, 93, 152

Values

Hex#645D98

RGB100, 93, 152

HSL247°, 24%, 48%

On White5.9:1

On Black3.56:1

#E8E8DE background

#182310 ink

#645D98 accent

#78558B support

#C5C3BF neutral

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Use these colors:

Background: #E8E8DE (background)
Ink: #182310 (ink)
Accent: #645D98 (accent)
Support: #78558B (support)
Neutral: #C5C3BF (neutral)

Build a design system around this color.