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Recognised as Colour

#0166AA

  • #0166AA
  • Blue
  • Dark
  • Nearest: Steel blue

#0166AA is a blue with RGB values 1, 102, 170 and HSL 204°, 99%, 34%. It is a dark colour, so white text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#0166AA#0166AA
HEX#0166AA
RGBrgb(1, 102, 170)
RGB (0–1)0.0039, 0.4, 0.6667
RGB percentages0.4%, 40%, 66.7%
HSLhsl(204.1, 98.8%, 33.5%)
HSV / HSBhsv(204.1, 99.4%, 66.7%)
CMYK99.4%, 40%, 0%, 33.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer91,818
CSS custom property--colour: #0166AA;

Brightness & contrast

Relative luminance0.12411WCAG 2.x, 0 is black and 1 is white
Perceived brightness97 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.03:1
Contrast with white6.03:1WCAG normal text: AA
Contrast with black3.48:1WCAG normal text: Fail
Greyscale equivalent#555555
Inverted#FE9955

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#446AADno red cones; affects about 1% of men; ΔE 7.7 from the original
Deuteranopia#2A5DA9no green cones; the most common form, about 1% of men; ΔE 9.2 from the original
Tritanopia#00777Fno blue cones; rare, and affects men and women equally; ΔE 40.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.03:1WCAG large text: AAA
Contrast with black, large text3.48:1WCAG large text: AA

Named colours

Steel blue · ΔE 16.3Cornflower blue · ΔE 22.4Dark slateblue · ΔE 26.9Dodgerblue · ΔE 28Royal blue · ΔE 33.6Slate grey · ΔE 34.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 16.3, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AA4501
Analogous#01AA9A, #0111AA
Triadic#AA0166, #66AA01
Split complementary#AA0111, #AA9901
Tetradic#9A01AA, #AA4501, #11AA01

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#79C9FE
Lighter +30%#46B4FE
Lighter +20%#139FFE
Lighter +10%#0184DD
Darker −10%#014877
Darker −20%#002945
Darker −30%#000B12
Darker −40%#000000
More saturated +25%#0066AB
Less saturated −25%#166295

Channel breakdown

R1
G102
B170
Red1 (0.4%)
Green102 (40%)
Blue170 (66.7%)
Hue204.14°
Saturation (HSL)98.83%
Lightness33.53%
Dominant channelBlue
Hex per channelR 01 · G 66 · B AA

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Every value on this page was computed from “0166aa” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.