#637F97

RGB 99, 127, 151

Values

Hex#637F97

RGB99, 127, 151

HSL208°, 21%, 49%

On White4.19:1

On Black5.01:1

#F6F5F4 background

#181711 ink

#637F97 accent

#34437F support

#CDB6B7 neutral

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Use these colors:

Background: #F6F5F4 (background)
Ink: #181711 (ink)
Accent: #637F97 (accent)
Support: #34437F (support)
Neutral: #CDB6B7 (neutral)

Build a design system around this color.