#404FBF
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
0.104
Hue H
233°
Saturation S
50%
Lightness L
50%
Value V
75%
Temperature
Cool
Brightness
Dark
Chroma
Muted
Hue family
Blue
Contrast on white: 6.80:1 (AA body Pass / AAA Fail)
Contrast on black: 3.09:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#404fbf
Protanopia
#4647a4
Deuteranopia
#46459d
Tritanopia
#418e8a
Achromatopsia
#575757
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.