#403D2B
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
0.046
Hue H
51°
Saturation S
20%
Lightness L
21%
Value V
25%
Temperature
Warm
Brightness
Dark
Chroma
Muted
Hue family
Yellow
Contrast on white: 10.94:1 (AA body Pass / AAA Pass)
Contrast on black: 1.92:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#403d2b
Protanopia
#3f3f2f
Deuteranopia
#3f3f30
Tritanopia
#403334
Achromatopsia
#3c3c3c
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.