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Recognised as Colour

#003389

  • #003389
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003389 is a blue with RGB values 0, 51, 137 and HSL 218°, 100%, 27%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003389#003389
HEX#003389
RGBrgb(0, 51, 137)
RGB (0–1)0, 0.2, 0.5373
RGB percentages0%, 20%, 53.7%
HSLhsl(217.7, 100%, 26.9%)
HSV / HSBhsv(217.7, 100%, 53.7%)
CMYK100%, 62.8%, 0%, 46.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,193
CSS custom property--colour: #003389;

Brightness & contrast

Relative luminance0.04174WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.45:1
Contrast with white11.45:1WCAG normal text: AAA
Contrast with black1.83:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#FFCC76

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00408Cno red cones; affects about 1% of men; ΔE 10.1 from the original
Deuteranopia#003487no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#004A59no blue cones; rare, and affects men and women equally; ΔE 52.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.45:1WCAG large text: AAA
Contrast with black, large text1.83:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 12.3Midnight blue · ΔE 12.8Rebecca purple · ΔE 22.8Slate blue · ΔE 25.9Royal blue · ΔE 27.5Indigo · ΔE 29.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.28, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#895600
Analogous#007789, #120089
Triadic#890033, #338900
Split complementary#891200, #778900
Tetradic#890077, #895600, #008912

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5695FF
Lighter +30%#2375FF
Lighter +20%#0059EF
Lighter +10%#0046BC
Darker −10%#002056
Darker −20%#000D23
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003389
Less saturated −25%#113778

Channel breakdown

R0
G51
B137
Red0 (0%)
Green51 (20%)
Blue137 (53.7%)
Hue217.66°
Saturation (HSL)100%
Lightness26.86%
Dominant channelBlue
Hex per channelR 00 · G 33 · B 89

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Every value on this page was computed from “hex 003389” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.