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Recognised as Colour

#0428A4

  • #0428A4
  • Blue
  • Dark
  • Nearest: Navy

#0428A4 is a blue with RGB values 4, 40, 164 and HSL 227°, 95%, 33%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Navy.

Colour values

#0428A4#0428A4
HEX#0428A4
RGBrgb(4, 40, 164)
RGB (0–1)0.0157, 0.1569, 0.6431
RGB percentages1.6%, 15.7%, 64.3%
HSLhsl(226.5, 95.2%, 32.9%)
HSV / HSBhsv(226.5, 97.6%, 64.3%)
CMYK97.6%, 75.6%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer272,548
CSS custom property--colour: #0428A4;

Brightness & contrast

Relative luminance0.04224WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.38:1
Contrast with white11.38:1WCAG normal text: AAA
Contrast with black1.84:1WCAG normal text: Fail
Greyscale equivalent#292929
Inverted#FBD75B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0041A8no red cones; affects about 1% of men; ΔE 18.3 from the original
Deuteranopia#0032A2no green cones; the most common form, about 1% of men; ΔE 8.8 from the original
Tritanopia#004D64no blue cones; rare, and affects men and women equally; ΔE 71.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.38:1WCAG large text: AAA
Contrast with black, large text1.84:1WCAG large text: Fail

Named colours

Navy · ΔE 13.9Dark blue · ΔE 13.9Indigo · ΔE 19Midnight blue · ΔE 22.1Rebecca purple · ΔE 22.7Slate blue · ΔE 23.7
Nearest named CSS colourNavy (#000080)ΔE 13.85, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A48004
Analogous#0478A4, #3004A4
Triadic#A40428, #28A404
Split complementary#A43004, #78A404
Tetradic#A40478, #A48004, #04A430

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7896FC
Lighter +30%#476FFB
Lighter +20%#1548F9
Lighter +10%#0534D6
Darker −10%#031C72
Darker −20%#021040
Darker −30%#00040F
Darker −40%#000000
More saturated +25%#0026A8
Less saturated −25%#19348F

Channel breakdown

R4
G40
B164
Red4 (1.6%)
Green40 (15.7%)
Blue164 (64.3%)
Hue226.5°
Saturation (HSL)95.24%
Lightness32.94%
Dominant channelBlue
Hex per channelR 04 · G 28 · B A4

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Every value on this page was computed from “0428a4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.