#645A8C

RGB 100, 90, 140

Values

Hex#645A8C

RGB100, 90, 140

HSL252°, 22%, 45%

On White6.21:1

On Black3.38:1

#ECEEE7 background

#192B12 ink

#645A8C accent

#7B6388 support

#ACABA5 neutral

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Use these colors:

Background: #ECEEE7 (background)
Ink: #192B12 (ink)
Accent: #645A8C (accent)
Support: #7B6388 (support)
Neutral: #ACABA5 (neutral)

Build a design system around this color.