#638D97

RGB 99, 141, 151

Values

Hex#638D97

RGB99, 141, 151

HSL192°, 21%, 49%

On White3.63:1

On Black5.79:1

#ECE5E4 background

#29271E ink

#638D97 accent

#4C638A support

#CDC1C6 neutral

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Use these colors:

Background: #ECE5E4 (background)
Ink: #29271E (ink)
Accent: #638D97 (accent)
Support: #4C638A (support)
Neutral: #CDC1C6 (neutral)

Build a design system around this color.