#3F3D47
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
0.048
Hue H
252°
Saturation S
8%
Lightness L
26%
Value V
28%
Temperature
Neutral
Brightness
Dark
Chroma
Near gray
Hue family
Blue
Contrast on white: 10.66:1 (AA body Pass / AAA Pass)
Contrast on black: 1.97:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#3f3d47
Protanopia
#3e3e45
Deuteranopia
#3e3e44
Tritanopia
#3f4342
Achromatopsia
#3f3f3f
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.