#3F5A4E
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
0.089
Hue H
153°
Saturation S
18%
Lightness L
30%
Value V
35%
Temperature
Cool
Brightness
Dark
Chroma
Muted
Hue family
Green
Contrast on white: 7.54:1 (AA body Pass / AAA Pass)
Contrast on black: 2.78:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#3f5a4e
Protanopia
#4b4b51
Deuteranopia
#494752
Tritanopia
#405354
Achromatopsia
#515151
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.