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Recognised as Colour

#66A8FB

  • #66A8FB
  • Blue
  • Dark
  • Nearest: Cornflower blue

#66A8FB is a blue with RGB values 102, 168, 251 and HSL 213°, 95%, 69%. It is a dark colour, so black text on it reaches 8.6:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#66A8FB#66A8FB
HEX#66A8FB
RGBrgb(102, 168, 251)
RGB (0–1)0.4, 0.6588, 0.9843
RGB percentages40%, 65.9%, 98.4%
HSLhsl(213.4, 94.9%, 69.2%)
HSV / HSBhsv(213.4, 59.4%, 98.4%)
CMYK59.4%, 33.1%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,727,931
CSS custom property--colour: #66A8FB;

Brightness & contrast

Relative luminance0.37795WCAG 2.x, 0 is black and 1 is white
Perceived brightness163.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.56:1
Contrast with white2.45:1WCAG normal text: Fail
Contrast with black8.56:1WCAG normal text: AAA
Greyscale equivalent#A0A0A0
Inverted#995704

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#85ADFEno red cones; affects about 1% of men; ΔE 6.4 from the original
Deuteranopia#719FF9no green cones; the most common form, about 1% of men; ΔE 7.3 from the original
Tritanopia#00BBC6no blue cones; rare, and affects men and women equally; ΔE 48.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.45:1WCAG large text: Fail
Contrast with black, large text8.56:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 8.7Dodgerblue · ΔE 19.2Deep skyblue · ΔE 22Steel blue · ΔE 23Light skyblue · ΔE 26.5Sky blue · ΔE 33.9
Nearest named CSS colourCornflower blue (#6495ED)ΔE 8.7, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FBB966
Analogous#66F3FB, #6E66FB
Triadic#FB66A8, #A8FB66
Split complementary#FB6E66, #F3FB66
Tetradic#FB66F3, #FBB966, #66FB6E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FBFDFF
Lighter +20%#C9E1FE
Lighter +10%#98C4FC
Darker −10%#348CFA
Darker −20%#0670F5
Darker −30%#0559C3
Darker −40%#044291
More saturated +25%#62A8FF
Less saturated −25%#7AAAE7

Channel breakdown

R102
G168
B251
Red102 (40%)
Green168 (65.9%)
Blue251 (98.4%)
Hue213.42°
Saturation (HSL)94.9%
Lightness69.22%
Dominant channelBlue
Hex per channelR 66 · G A8 · B FB

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Every value on this page was computed from “66a8fb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.