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Colour

#66B3FE

  • #66B3FE
  • Blue
  • Dark
  • Nearest: Cornflower blue

#66B3FE is a blue with RGB values 102, 179, 254 and HSL 210°, 99%, 70%. It is a dark colour, so black text on it reaches 9.4:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#66B3FE#66B3FE
HEX#66B3FE
RGBrgb(102, 179, 254)
RGB (0–1)0.4, 0.702, 0.9961
RGB percentages40%, 70.2%, 99.6%
HSLhsl(209.6, 98.7%, 69.8%)
HSV / HSBhsv(209.6, 59.8%, 99.6%)
CMYK59.8%, 29.5%, 0%, 0.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,730,750
CSS custom property--colour: #66B3FE;

Brightness & contrast

Relative luminance0.42221WCAG 2.x, 0 is black and 1 is white
Perceived brightness171.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.44:1
Contrast with white2.22:1WCAG normal text: Fail
Contrast with black9.44:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#994C01

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#93B6FFno red cones; affects about 1% of men; ΔE 10 from the original
Deuteranopia#7FA7FDno green cones; the most common form, about 1% of men; ΔE 12.1 from the original
Tritanopia#00C5CDno blue cones; rare, and affects men and women equally; ΔE 45.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.22:1WCAG large text: Fail
Contrast with black, large text9.44:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 15.4Deep skyblue · ΔE 15.8Light skyblue · ΔE 20Steel blue · ΔE 22.2Dodgerblue · ΔE 25.4Sky blue · ΔE 27.6
Nearest named CSS colourCornflower blue (#6495ED)ΔE 15.39, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FEB166
Analogous#66FEFD, #6667FE
Triadic#FE66B3, #B3FE66
Split complementary#FE6667, #FEFD66
Tetradic#FD66FE, #FEB166, #67FE66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FEFFFF
Lighter +20%#CBE5FF
Lighter +10%#99CCFE
Darker −10%#339AFE
Darker −20%#0281FC
Darker −30%#0167CA
Darker −40%#014D97
More saturated +25%#65B3FF
Less saturated −25%#79B3EB

Channel breakdown

R102
G179
B254
Red102 (40%)
Green179 (70.2%)
Blue254 (99.6%)
Hue209.61°
Saturation (HSL)98.7%
Lightness69.8%
Dominant channelBlue
Hex per channelR 66 · G B3 · B FE

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Every value on this page was computed from “66b3fe” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.