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Colour

#66B8EA

  • #66B8EA
  • Blue
  • Dark
  • Nearest: Light skyblue

#66B8EA is a blue with RGB values 102, 184, 234 and HSL 203°, 76%, 66%. It is a dark colour, so black text on it reaches 9.6:1 contrast (AAA for normal text). The nearest named colour is Light skyblue.

Colour values

#66B8EA#66B8EA
HEX#66B8EA
RGBrgb(102, 184, 234)
RGB (0–1)0.4, 0.7216, 0.9176
RGB percentages40%, 72.2%, 91.8%
HSLhsl(202.7, 75.9%, 65.9%)
HSV / HSBhsv(202.7, 56.4%, 91.8%)
CMYK56.4%, 21.4%, 0%, 8.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,732,010
CSS custom property--colour: #66B8EA;

Brightness & contrast

Relative luminance0.43046WCAG 2.x, 0 is black and 1 is white
Perceived brightness171 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.61:1
Contrast with white2.19:1WCAG normal text: Fail
Contrast with black9.61:1WCAG normal text: AAA
Greyscale equivalent#AAAAAA
Inverted#994715

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A1B7ECno red cones; affects about 1% of men; ΔE 16.2 from the original
Deuteranopia#8FA9E9no green cones; the most common form, about 1% of men; ΔE 17.9 from the original
Tritanopia#00C5C9no blue cones; rare, and affects men and women equally; ΔE 33.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.19:1WCAG large text: Fail
Contrast with black, large text9.61:1WCAG large text: AAA

Named colours

Light skyblue · ΔE 9.1Deep skyblue · ΔE 12.1Sky blue · ΔE 14.2Steel blue · ΔE 20.3Light steelblue · ΔE 21Light blue · ΔE 24.4
Nearest named CSS colourLight skyblue (#87CEFA)ΔE 9.09, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#EA9866
Analogous#66EADA, #6676EA
Triadic#EA66B8, #B8EA66
Split complementary#EA6676, #EADA66
Tetradic#DA66EA, #EA9866, #76EA66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EDF6FC
Lighter +20%#C0E2F6
Lighter +10%#93CDF0
Darker −10%#39A3E4
Darker −20%#1C8BCE
Darker −30%#166CA1
Darker −40%#104E74
More saturated +25%#51BDFF
Less saturated −25%#7CB3D4

Channel breakdown

R102
G184
B234
Red102 (40%)
Green184 (72.2%)
Blue234 (91.8%)
Hue202.73°
Saturation (HSL)75.86%
Lightness65.88%
Dominant channelBlue
Hex per channelR 66 · G B8 · B EA

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Every value on this page was computed from “66b8ea” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.