#3F428D

RGB 63, 66, 141

Values

Hex#3F428D

RGB63, 66, 141

HSL238°, 38%, 40%

On White8.84:1

On Black2.38:1

#E8E8E3 background

#374026 ink

#3F428D accent

#744FA1 support

#BBB3AF neutral

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Use these colors:

Background: #E8E8E3 (background)
Ink: #374026 (ink)
Accent: #3F428D (accent)
Support: #744FA1 (support)
Neutral: #BBB3AF (neutral)

Build a design system around this color.