#3F4C4E
Approximate name: Dark 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
DarkSlateGray
Relative luminance
0.068
Hue H
188°
Saturation S
11%
Lightness L
28%
Value V
31%
Temperature
Cool
Brightness
Dark
Chroma
Muted
Hue family
Cyan
Contrast on white: 8.92:1 (AA body Pass / AAA Pass)
Contrast on black: 2.36:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#3f4c4e
Protanopia
#45454e
Deuteranopia
#44434d
Tritanopia
#404d4d
Achromatopsia
#484848
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.