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Recognised as Colour

#00539A

  • #00539A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#00539A is a blue with RGB values 0, 83, 154 and HSL 208°, 100%, 30%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#00539A#00539A
HEX#00539A
RGBrgb(0, 83, 154)
RGB (0–1)0, 0.3255, 0.6039
RGB percentages0%, 32.5%, 60.4%
HSLhsl(207.7, 100%, 30.2%)
HSV / HSBhsv(207.7, 100%, 60.4%)
CMYK100%, 46.1%, 0%, 39.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer21,402
CSS custom property--colour: #00539A;

Brightness & contrast

Relative luminance0.0852WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.77:1
Contrast with white7.77:1WCAG normal text: AAA
Contrast with black2.7:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#FFAC65

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2C599Dno red cones; affects about 1% of men; ΔE 4.5 from the original
Deuteranopia#034D99no green cones; the most common form, about 1% of men; ΔE 4.8 from the original
Tritanopia#00646Fno blue cones; rare, and affects men and women equally; ΔE 41.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.77:1WCAG large text: AAA
Contrast with black, large text2.7:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 19.4Steel blue · ΔE 24.2Cornflower blue · ΔE 27.4Royal blue · ΔE 30.8Dodgerblue · ΔE 30.9Midnight blue · ΔE 31.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 19.43, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9A4700
Analogous#009A94, #00069A
Triadic#9A0053, #539A00
Split complementary#9A0006, #9A9400
Tetradic#94009A, #9A4700, #069A00

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#67B9FF
Lighter +30%#34A1FF
Lighter +20%#018AFF
Lighter +10%#006ECD
Darker −10%#003867
Darker −20%#001C34
Darker −30%#000101
Darker −40%#000000
More saturated +25%#00539A
Less saturated −25%#135287

Channel breakdown

R0
G83
B154
Red0 (0%)
Green83 (32.5%)
Blue154 (60.4%)
Hue207.66°
Saturation (HSL)100%
Lightness30.2%
Dominant channelBlue
Hex per channelR 00 · G 53 · B 9A

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Every value on this page was computed from “00539a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.