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Recognised as Colour

#0066B5

  • #0066B5
  • Blue
  • Dark
  • Nearest: Cornflower blue

#0066B5 is a blue with RGB values 0, 102, 181 and HSL 206°, 100%, 35%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#0066B5#0066B5
HEX#0066B5
RGBrgb(0, 102, 181)
RGB (0–1)0, 0.4, 0.7098
RGB percentages0%, 40%, 71%
HSLhsl(206.2, 100%, 35.5%)
HSV / HSBhsv(206.2, 100%, 71%)
CMYK100%, 43.6%, 0%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer26,293
CSS custom property--colour: #0066B5;

Brightness & contrast

Relative luminance0.12839WCAG 2.x, 0 is black and 1 is white
Perceived brightness99.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.89:1
Contrast with white5.89:1WCAG normal text: AA
Contrast with black3.57:1WCAG normal text: Fail
Greyscale equivalent#565656
Inverted#FF994A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3C6CB8no red cones; affects about 1% of men; ΔE 5.7 from the original
Deuteranopia#185EB3no green cones; the most common form, about 1% of men; ΔE 6.4 from the original
Tritanopia#007984no blue cones; rare, and affects men and women equally; ΔE 45.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.89:1WCAG large text: AAA
Contrast with black, large text3.57:1WCAG large text: AA

Named colours

Cornflower blue · ΔE 19.7Steel blue · ΔE 21.7Dodgerblue · ΔE 22.8Dark slateblue · ΔE 24.1Royal blue · ΔE 26.8Slate blue · ΔE 31.6
Nearest named CSS colourCornflower blue (#6495ED)ΔE 19.71, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B54F00
Analogous#00B5A9, #000CB5
Triadic#B50066, #66B500
Split complementary#B5000C, #B5A900
Tetradic#A900B5, #B54F00, #0CB500

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#82C8FF
Lighter +30%#4FB2FF
Lighter +20%#1C9CFF
Lighter +10%#0083E8
Darker −10%#004982
Darker −20%#002D4F
Darker −30%#00101C
Darker −40%#000000
More saturated +25%#0066B5
Less saturated −25%#17639E

Channel breakdown

R0
G102
B181
Red0 (0%)
Green102 (40%)
Blue181 (71%)
Hue206.19°
Saturation (HSL)100%
Lightness35.49%
Dominant channelBlue
Hex per channelR 00 · G 66 · B B5

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Every value on this page was computed from “0066b5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.