#040B0B
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
0.003
Hue H
180°
Saturation S
47%
Lightness L
3%
Value V
4%
Temperature
Cool
Brightness
Dark
Chroma
Muted
Hue family
Cyan
Contrast on white: 19.85:1 (AA body Pass / AAA Pass)
Contrast on black: 1.06:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#040b0b
Protanopia
#07070b
Deuteranopia
#07060b
Tritanopia
#040b0b
Achromatopsia
#090909
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.