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Recognised as Colour

#166CD0

  • #166CD0
  • Blue
  • Dark
  • Nearest: Royal blue

#166CD0 is a blue with RGB values 22, 108, 208 and HSL 212°, 81%, 45%. It is a dark colour, so white text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#166CD0#166CD0
HEX#166CD0
RGBrgb(22, 108, 208)
RGB (0–1)0.0863, 0.4235, 0.8157
RGB percentages8.6%, 42.4%, 81.6%
HSLhsl(212.3, 80.9%, 45.1%)
HSV / HSBhsv(212.3, 89.4%, 81.6%)
CMYK89.4%, 48.1%, 0%, 18.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,469,648
CSS custom property--colour: #166CD0;

Brightness & contrast

Relative luminance0.1545WCAG 2.x, 0 is black and 1 is white
Perceived brightness109.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.13:1
Contrast with white5.13:1WCAG normal text: AA
Contrast with black4.09:1WCAG normal text: Fail
Greyscale equivalent#616161
Inverted#E9932F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3076D4no red cones; affects about 1% of men; ΔE 5.8 from the original
Deuteranopia#0066CEno green cones; the most common form, about 1% of men; ΔE 3.8 from the original
Tritanopia#008494no blue cones; rare, and affects men and women equally; ΔE 56.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.13:1WCAG large text: AAA
Contrast with black, large text4.09:1WCAG large text: AA

Named colours

Royal blue · ΔE 14.4Dodgerblue · ΔE 14.6Cornflower blue · ΔE 18.6Slate blue · ΔE 22.2Dark slateblue · ΔE 25.4Medium purple · ΔE 25.9
Nearest named CSS colourRoyal blue (#4169E1)ΔE 14.36, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D07A16
Analogous#16C9D0, #1D16D0
Triadic#D0166C, #6CD016
Split complementary#D01D16, #C9D016
Tetradic#D016C9, #D07A16, #16D01D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BAD7F8
Lighter +30%#8CBCF3
Lighter +20%#5EA1EE
Lighter +10%#3086E9
Darker −10%#1154A2
Darker −20%#0C3C74
Darker −30%#072446
Darker −40%#020C18
More saturated +25%#006AE6
Less saturated −25%#336EB3

Channel breakdown

R22
G108
B208
Red22 (8.6%)
Green108 (42.4%)
Blue208 (81.6%)
Hue212.26°
Saturation (HSL)80.87%
Lightness45.1%
Dominant channelBlue
Hex per channelR 16 · G 6C · B D0

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Every value on this page was computed from “166cd0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.