#313B39
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
0.041
Hue H
168°
Saturation S
9%
Lightness L
21%
Value V
23%
Temperature
Neutral
Brightness
Dark
Chroma
Near gray
Hue family
Cyan
Contrast on white: 11.57:1 (AA body Pass / AAA Pass)
Contrast on black: 1.82:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#313b39
Protanopia
#353539
Deuteranopia
#35343a
Tritanopia
#323a3a
Achromatopsia
#383838
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.