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Recognised as Colour

#003789

  • #003789
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003789 is a blue with RGB values 0, 55, 137 and HSL 216°, 100%, 27%. It is a dark colour, so white text on it reaches 11:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003789#003789
HEX#003789
RGBrgb(0, 55, 137)
RGB (0–1)0, 0.2157, 0.5373
RGB percentages0%, 21.6%, 53.7%
HSLhsl(215.9, 100%, 26.9%)
HSV / HSBhsv(215.9, 100%, 53.7%)
CMYK100%, 59.9%, 0%, 46.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer14,217
CSS custom property--colour: #003789;

Brightness & contrast

Relative luminance0.04539WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.01:1
Contrast with white11.01:1WCAG normal text: AAA
Contrast with black1.91:1WCAG normal text: Fail
Greyscale equivalent#313131
Inverted#FFC876

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00428Cno red cones; affects about 1% of men; ΔE 8.3 from the original
Deuteranopia#003787no green cones; the most common form, about 1% of men; ΔE 1.3 from the original
Tritanopia#004C5Ano blue cones; rare, and affects men and women equally; ΔE 49.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.01:1WCAG large text: AAA
Contrast with black, large text1.91:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11.6Midnight blue · ΔE 15.6Rebecca purple · ΔE 24.8Slate blue · ΔE 27.2Royal blue · ΔE 28.1Indigo · ΔE 32.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.59, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#895200
Analogous#007B89, #0D0089
Triadic#890037, #378900
Split complementary#890E00, #7B8900
Tetradic#89007C, #895200, #00890E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#569AFF
Lighter +30%#237BFF
Lighter +20%#0060EF
Lighter +10%#004BBC
Darker −10%#002356
Darker −20%#000E23
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003789
Less saturated −25%#113A78

Channel breakdown

R0
G55
B137
Red0 (0%)
Green55 (21.6%)
Blue137 (53.7%)
Hue215.91°
Saturation (HSL)100%
Lightness26.86%
Dominant channelBlue
Hex per channelR 00 · G 37 · B 89

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Every value on this page was computed from “hex 003789” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.