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Recognised as Colour

#1666F8

  • #1666F8
  • Blue
  • Dark
  • Nearest: Royal blue

#1666F8 is a blue with RGB values 22, 102, 248 and HSL 219°, 94%, 53%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#1666F8#1666F8
HEX#1666F8
RGBrgb(22, 102, 248)
RGB (0–1)0.0863, 0.4, 0.9725
RGB percentages8.6%, 40%, 97.3%
HSLhsl(218.8, 94.2%, 52.9%)
HSV / HSBhsv(218.8, 91.1%, 97.3%)
CMYK91.1%, 58.9%, 0%, 2.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,468,152
CSS custom property--colour: #1666F8;

Brightness & contrast

Relative luminance0.16451WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.89:1
Contrast with white4.89:1WCAG normal text: AA
Contrast with black4.29:1WCAG normal text: Fail
Greyscale equivalent#606060
Inverted#E99907

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#007BFDno red cones; affects about 1% of men; ΔE 14.8 from the original
Deuteranopia#0067F5no green cones; the most common form, about 1% of men; ΔE 2.7 from the original
Tritanopia#008CA5no blue cones; rare, and affects men and women equally; ΔE 79.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.89:1WCAG large text: AAA
Contrast with black, large text4.29:1WCAG large text: AA

Named colours

Royal blue · ΔE 15.1Medium slateblue · ΔE 16.1Slate blue · ΔE 21.2Medium purple · ΔE 29.8Dodgerblue · ΔE 30.2Rebecca purple · ΔE 36.1
Nearest named CSS colourRoyal blue (#4169E1)ΔE 15.07, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#F8A816
Analogous#16D7F8, #3716F8
Triadic#F81666, #66F816
Split complementary#F83716, #D7F816
Tetradic#F816D7, #F8A816, #16F837

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DCE8FE
Lighter +30%#ABC8FC
Lighter +20%#79A7FB
Lighter +10%#4887F9
Darker −10%#064FD5
Darker −20%#053DA3
Darker −30%#032A72
Darker −40%#021840
More saturated +25%#0F64FF
Less saturated −25%#346FDA

Channel breakdown

R22
G102
B248
Red22 (8.6%)
Green102 (40%)
Blue248 (97.3%)
Hue218.76°
Saturation (HSL)94.17%
Lightness52.94%
Dominant channelBlue
Hex per channelR 16 · G 66 · B F8

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Every value on this page was computed from “1666f8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.