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Recognised as Colour

#666AFE

  • #666AFE
  • Blue
  • Dark
  • Nearest: Medium slateblue

#666AFE is a blue with RGB values 102, 106, 254 and HSL 238°, 99%, 70%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#666AFE#666AFE
HEX#666AFE
RGBrgb(102, 106, 254)
RGB (0–1)0.4, 0.4157, 0.9961
RGB percentages40%, 41.6%, 99.6%
HSLhsl(238.4, 98.7%, 69.8%)
HSV / HSBhsv(238.4, 59.8%, 99.6%)
CMYK59.8%, 58.3%, 0%, 0.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,712,062
CSS custom property--colour: #666AFE;

Brightness & contrast

Relative luminance0.20289WCAG 2.x, 0 is black and 1 is white
Perceived brightness130.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.06:1
Contrast with white4.15:1WCAG normal text: Fail
Contrast with black5.06:1WCAG normal text: AA
Greyscale equivalent#747474
Inverted#999501

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0083FFno red cones; affects about 1% of men; ΔE 24.7 from the original
Deuteranopia#0076FBno green cones; the most common form, about 1% of men; ΔE 17.4 from the original
Tritanopia#008EAAno blue cones; rare, and affects men and women equally; ΔE 80.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.15:1WCAG large text: AA
Contrast with black, large text5.06:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 9Royal blue · ΔE 17.8Slate blue · ΔE 18.6Medium purple · ΔE 24.8Dark orchid · ΔE 29.4Blue violet · ΔE 30.6
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 8.97, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FEFA66
Analogous#66B6FE, #AE66FE
Triadic#FE666A, #6AFE66
Split complementary#FEAE66, #B6FE66
Tetradic#FE66B6, #FEFA66, #66FEAE

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FEFEFF
Lighter +20%#CBCDFF
Lighter +10%#999BFE
Darker −10%#3339FE
Darker −20%#0208FC
Darker −30%#0107CA
Darker −40%#010597
More saturated +25%#6569FF
Less saturated −25%#797CEB

Channel breakdown

R102
G106
B254
Red102 (40%)
Green106 (41.6%)
Blue254 (99.6%)
Hue238.42°
Saturation (HSL)98.7%
Lightness69.8%
Dominant channelBlue
Hex per channelR 66 · G 6A · B FE

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Every value on this page was computed from “666afe” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.