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Colour

#0166CA

  • #0166CA
  • Blue
  • Dark
  • Nearest: Royal blue

#0166CA is a blue with RGB values 1, 102, 202 and HSL 210°, 99%, 40%. It is a dark colour, so white text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#0166CA#0166CA
HEX#0166CA
RGBrgb(1, 102, 202)
RGB (0–1)0.0039, 0.4, 0.7922
RGB percentages0.4%, 40%, 79.2%
HSLhsl(209.9, 99%, 39.8%)
HSV / HSBhsv(209.9, 99.5%, 79.2%)
CMYK99.5%, 49.5%, 0%, 20.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer91,850
CSS custom property--colour: #0166CA;

Brightness & contrast

Relative luminance0.13773WCAG 2.x, 0 is black and 1 is white
Perceived brightness103.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.59:1
Contrast with white5.59:1WCAG normal text: AA
Contrast with black3.75:1WCAG normal text: Fail
Greyscale equivalent#585858
Inverted#FE9935

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2570CEno red cones; affects about 1% of men; ΔE 5.9 from the original
Deuteranopia#0060C8no green cones; the most common form, about 1% of men; ΔE 4 from the original
Tritanopia#007F8Eno blue cones; rare, and affects men and women equally; ΔE 57 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.59:1WCAG large text: AAA
Contrast with black, large text3.75:1WCAG large text: AA

Named colours

Royal blue · ΔE 14.1Dodgerblue · ΔE 16.8Cornflower blue · ΔE 20.9Slate blue · ΔE 21.6Dark slateblue · ΔE 24Medium purple · ΔE 26.3
Nearest named CSS colourRoyal blue (#4169E1)ΔE 14.09, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CA6501
Analogous#01CACA, #0101CA
Triadic#CA0166, #66CA01
Split complementary#CA0101, #CACA01
Tetradic#CA01CA, #CA6501, #01CA01

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#99CCFE
Lighter +30%#66B2FE
Lighter +20%#3399FE
Lighter +10%#0180FD
Darker −10%#014C97
Darker −20%#003365
Darker −30%#001932
Darker −40%#000000
More saturated +25%#0066CB
Less saturated −25%#1A66B1

Channel breakdown

R1
G102
B202
Red1 (0.4%)
Green102 (40%)
Blue202 (79.2%)
Hue209.85°
Saturation (HSL)99.01%
Lightness39.8%
Dominant channelBlue
Hex per channelR 01 · G 66 · B CA

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