#3F525A
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
0.078
Hue H
198°
Saturation S
18%
Lightness L
30%
Value V
35%
Temperature
Cool
Brightness
Dark
Chroma
Muted
Hue family
Cyan
Contrast on white: 8.18:1 (AA body Pass / AAA Pass)
Contrast on black: 2.57:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#3f525a
Protanopia
#474758
Deuteranopia
#464558
Tritanopia
#405756
Achromatopsia
#4d4d4d
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.