#040A1B
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
224°
Saturation S
74%
Lightness L
6%
Value V
11%
Temperature
Cool
Brightness
Dark
Chroma
Vivid
Hue family
Blue
Contrast on white: 19.73:1 (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
#040a1b
Protanopia
#070717
Deuteranopia
#060616
Tritanopia
#041413
Achromatopsia
#0a0a0a
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.