#4169E1
Approximate name: Royal 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
RoyalBlue
Relative luminance
0.167
Hue H
225°
Saturation S
73%
Lightness L
57%
Value V
88%
Temperature
Cool
Brightness
Dark
Chroma
Vivid
Hue family
Blue
Contrast on white: 4.85:1 (AA body Pass / AAA Fail)
Contrast on black: 4.33:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#4169e1
Protanopia
#5253c4
Deuteranopia
#504dbd
Tritanopia
#43ada8
Achromatopsia
#6b6b6b
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.