#171731
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
0.01
Hue H
240°
Saturation S
36%
Lightness L
14%
Value V
19%
Temperature
Cool
Brightness
Dark
Chroma
Muted
Hue family
Blue
Contrast on white: 17.45:1 (AA body Pass / AAA Pass)
Contrast on black: 1.20:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#171731
Protanopia
#17172b
Deuteranopia
#171729
Tritanopia
#172625
Achromatopsia
#1a1a1a
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.