#3F879D

RGB 63, 135, 157

Values

Hex#3F879D

RGB63, 135, 157

HSL194°, 43%, 43%

On White4.07:1

On Black5.16:1

#E8E5E3 background

#28261A ink

#3F879D accent

#606CA9 support

#A5979C neutral

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Use these colors:

Background: #E8E5E3 (background)
Ink: #28261A (ink)
Accent: #3F879D (accent)
Support: #606CA9 (support)
Neutral: #A5979C (neutral)

Build a design system around this color.