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Colour

#004288

  • #004288
  • Blue
  • Dark
  • Nearest: Dark slateblue

#004288 is a blue with RGB values 0, 66, 136 and HSL 211°, 100%, 27%. It is a dark colour, so white text on it reaches 9.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#004288#004288
HEX#004288
RGBrgb(0, 66, 136)
RGB (0–1)0, 0.2588, 0.5333
RGB percentages0%, 25.9%, 53.3%
HSLhsl(210.9, 100%, 26.7%)
HSV / HSBhsv(210.9, 100%, 53.3%)
CMYK100%, 51.5%, 0%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer17,032
CSS custom property--colour: #004288;

Brightness & contrast

Relative luminance0.05674WCAG 2.x, 0 is black and 1 is white
Perceived brightness68.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.84:1
Contrast with white9.84:1WCAG normal text: AAA
Contrast with black2.13:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#FFBD77

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#14498Bno red cones; affects about 1% of men; ΔE 4.3 from the original
Deuteranopia#003E87no green cones; the most common form, about 1% of men; ΔE 3.1 from the original
Tritanopia#00535Eno blue cones; rare, and affects men and women equally; ΔE 42.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.84:1WCAG large text: AAA
Contrast with black, large text2.13:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15.2Midnight blue · ΔE 24.8Steel blue · ΔE 30.7Rebecca purple · ΔE 32.1Royal blue · ΔE 32.4Slate blue · ΔE 33
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.16, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#884600
Analogous#008688, #020088
Triadic#880042, #428800
Split complementary#880200, #868800
Tetradic#880086, #884600, #008802

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#55A8FF
Lighter +30%#228DFF
Lighter +20%#0074EE
Lighter +10%#005BBB
Darker −10%#002955
Darker −20%#001122
Darker −30%#000000
Darker −40%#000000
More saturated +25%#004288
Less saturated −25%#114377

Channel breakdown

R0
G66
B136
Red0 (0%)
Green66 (25.9%)
Blue136 (53.3%)
Hue210.88°
Saturation (HSL)100%
Lightness26.67%
Dominant channelBlue
Hex per channelR 00 · G 42 · B 88

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Every value on this page was computed from “hex 004288” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.