#5555AA
Approximate name: Slate Blue
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
SlateBlue
Relative luminance
0.113
Hue H
240°
Saturation S
33%
Lightness L
50%
Value V
67%
Temperature
Cool
Brightness
Dark
Chroma
Muted
Hue family
Blue
Contrast on white: 6.43:1 (AA body Pass / AAA Fail)
Contrast on black: 3.27:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#5555aa
Protanopia
#555595
Deuteranopia
#555591
Tritanopia
#558582
Achromatopsia
#5f5f5f
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.