#3F599D

RGB 63, 89, 157

Values

Hex#3F599D

RGB63, 89, 157

HSL223°, 43%, 43%

On White6.72:1

On Black3.13:1

#ECECE9 background

#292B21 ink

#3F599D accent

#5F5775 support

#AA9692 neutral

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Use these colors:

Background: #ECECE9 (background)
Ink: #292B21 (ink)
Accent: #3F599D (accent)
Support: #5F5775 (support)
Neutral: #AA9692 (neutral)

Build a design system around this color.