#393F55
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
0.051
Hue H
227°
Saturation S
20%
Lightness L
28%
Value V
33%
Temperature
Cool
Brightness
Dark
Chroma
Muted
Hue family
Blue
Contrast on white: 10.42:1 (AA body Pass / AAA Pass)
Contrast on black: 2.02:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#393f55
Protanopia
#3c3c50
Deuteranopia
#3b3b4e
Tritanopia
#394b4b
Achromatopsia
#404040
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.