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Colour

#003678

  • #003678
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003678 is a blue with RGB values 0, 54, 120 and HSL 213°, 100%, 24%. It is a dark colour, so white text on it reaches 11.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003678#003678
HEX#003678
RGBrgb(0, 54, 120)
RGB (0–1)0, 0.2118, 0.4706
RGB percentages0%, 21.2%, 47.1%
HSLhsl(213, 100%, 23.5%)
HSV / HSBhsv(213, 100%, 47.1%)
CMYK100%, 55%, 0%, 52.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,944
CSS custom property--colour: #003678;

Brightness & contrast

Relative luminance0.03994WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.67:1
Contrast with white11.67:1WCAG normal text: AAA
Contrast with black1.8:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#FFC987

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#013E7Ano red cones; affects about 1% of men; ΔE 6.3 from the original
Deuteranopia#003377no green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#004651no blue cones; rare, and affects men and women equally; ΔE 40.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.67:1WCAG large text: AAA
Contrast with black, large text1.8:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15.1Midnight blue · ΔE 21.9Rebecca purple · ΔE 32Steel blue · ΔE 34.8Slate blue · ΔE 35.5Royal blue · ΔE 36.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.14, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#784200
Analogous#007278, #060078
Triadic#780036, #367800
Split complementary#780600, #727800
Tetradic#780072, #784200, #007806

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4599FF
Lighter +30%#127DFF
Lighter +20%#0064DE
Lighter +10%#004DAB
Darker −10%#001F45
Darker −20%#000812
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003678
Less saturated −25%#0F3869

Channel breakdown

R0
G54
B120
Red0 (0%)
Green54 (21.2%)
Blue120 (47.1%)
Hue213°
Saturation (HSL)100%
Lightness23.53%
Dominant channelBlue
Hex per channelR 00 · G 36 · B 78

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Every value on this page was computed from “hex 003678” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.