#637A8C

RGB 99, 122, 140

Values

Hex#637A8C

RGB99, 122, 140

HSL206°, 17%, 47%

On White4.47:1

On Black4.69:1

#EFEDEB background

#272611 ink

#637A8C accent

#7069B5 support

#B9B1B2 neutral

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Use these colors:

Background: #EFEDEB (background)
Ink: #272611 (ink)
Accent: #637A8C (accent)
Support: #7069B5 (support)
Neutral: #B9B1B2 (neutral)

Build a design system around this color.