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Colour

#6666FF

  • #6666FF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#6666FF is a blue with RGB values 102, 102, 255 and HSL 240°, 100%, 70%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#6666FF#6666FF
HEX#6666FF
HEX (short)#66F
RGBrgb(102, 102, 255)
RGB (0–1)0.4, 0.4, 1
RGB percentages40%, 40%, 100%
HSLhsl(240, 100%, 70%)
HSV / HSBhsv(240, 60%, 100%)
CMYK60%, 60%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,711,039
CSS custom property--colour: #6666FF;

Brightness & contrast

Relative luminance0.19548WCAG 2.x, 0 is black and 1 is white
Perceived brightness129 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.91:1
Contrast with white4.28:1WCAG normal text: Fail
Contrast with black4.91:1WCAG normal text: AA
Greyscale equivalent#717171
Inverted#999900

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0081FFno red cones; affects about 1% of men; ΔE 26.4 from the original
Deuteranopia#0074FCno green cones; the most common form, about 1% of men; ΔE 18.5 from the original
Tritanopia#008CA9no blue cones; rare, and affects men and women equally; ΔE 83 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.28:1WCAG large text: AA
Contrast with black, large text4.91:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 11.2Royal blue · ΔE 20.8Slate blue · ΔE 20.9Medium purple · ΔE 27.3Blue violet · ΔE 27.8Dark orchid · ΔE 28.1
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 11.22, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFFF66
Analogous#66B3FF, #B366FF
Triadic#FF6666, #66FF66
Split complementary#FFB366, #B3FF66
Tetradic#FF66B3, #FFFF66, #66FFB3

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#CCCCFF
Lighter +10%#9999FF
Darker −10%#3333FF
Darker −20%#0000FF
Darker −30%#0000CC
Darker −40%#000099
More saturated +25%#6666FF
Less saturated −25%#7979EC

Channel breakdown

R102
G102
B255
Red102 (40%)
Green102 (40%)
Blue255 (100%)
Hue240°
Saturation (HSL)100%
Lightness70%
Dominant channelBlue
Hex per channelR 66 · G 66 · B FF

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Every value on this page was computed from “6666ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.