#031A1B
Approximate name: Black
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
Black
Relative luminance
0.008
Hue H
183°
Saturation S
80%
Lightness L
6%
Value V
11%
Temperature
Cool
Brightness
Dark
Chroma
Vivid
Hue family
Cyan
Contrast on white: 17.99:1 (AA body Pass / AAA Pass)
Contrast on black: 1.17:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#031a1b
Protanopia
#0d0d1b
Deuteranopia
#0c0a1b
Tritanopia
#041b1b
Achromatopsia
#131313
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.