#657780
Approximate name: Slate Gray
Technical formats
Color-space values for scientific work and cross-device comparison.
Practical formats
Ready to paste into CSS, Tailwind, iOS, Android, Flutter, and more.
Color analysis
Objective metrics: luminance, hue, saturation, temperature, and contrast.
Nearest name
SlateGray
Relative luminance
0.175
Hue H
200°
Saturation S
12%
Lightness L
45%
Value V
50%
Temperature
Cool
Brightness
Dark
Chroma
Muted
Hue family
Blue
Contrast on white: 4.66:1 (AA body Pass / AAA Fail)
Contrast on black: 4.50:1 (AA body Pass / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#657780
Protanopia
#6d6d7e
Deuteranopia
#6c6a7d
Tritanopia
#667c7c
Achromatopsia
#737373
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.