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Colour

#6655DD

  • #6655DD
  • Blue
  • Dark
  • Nearest: Medium slateblue

#6655DD is a blue with RGB values 102, 85, 221 and HSL 248°, 67%, 60%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#6655DD#6655DD
HEX#6655DD
HEX (short)#65D
RGBrgb(102, 85, 221)
RGB (0–1)0.4, 0.3333, 0.8667
RGB percentages40%, 33.3%, 86.7%
HSLhsl(247.5, 66.7%, 60%)
HSV / HSBhsv(247.5, 61.5%, 86.7%)
CMYK53.8%, 61.5%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,706,653
CSS custom property--colour: #6655DD;

Brightness & contrast

Relative luminance0.14542WCAG 2.x, 0 is black and 1 is white
Perceived brightness113.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.37:1
Contrast with white5.37:1WCAG normal text: AA
Contrast with black3.91:1WCAG normal text: Fail
Greyscale equivalent#626262
Inverted#99AA22

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#006FE1no red cones; affects about 1% of men; ΔE 25.5 from the original
Deuteranopia#0066DAno green cones; the most common form, about 1% of men; ΔE 22.2 from the original
Tritanopia#317691no blue cones; rare, and affects men and women equally; ΔE 72.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.37:1WCAG large text: AAA
Contrast with black, large text3.91:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 7.7Slate blue · ΔE 12Royal blue · ΔE 17.1Medium purple · ΔE 21Dark orchid · ΔE 23.4Rebecca purple · ΔE 23.7
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 7.71, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CCDD55
Analogous#5588DD, #AA55DD
Triadic#DD6655, #55DD66
Split complementary#DDAA55, #88DD55
Tetradic#DD5588, #CCDD55, #55DDAA

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D9D5F7
Lighter +20%#B3AAEE
Lighter +10%#8C7FE5
Darker −10%#402AD5
Darker −20%#3322AA
Darker −30%#261980
Darker −40%#191155
More saturated +25%#533BF7
Less saturated −25%#796EC3

Channel breakdown

R102
G85
B221
Red102 (40%)
Green85 (33.3%)
Blue221 (86.7%)
Hue247.5°
Saturation (HSL)66.67%
Lightness60%
Dominant channelBlue
Hex per channelR 66 · G 55 · B DD

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Every value on this page was computed from “6655dd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.