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Colour

#6665DD

  • #6665DD
  • Blue
  • Dark
  • Nearest: Slate blue

#6665DD is a blue with RGB values 102, 101, 221 and HSL 241°, 64%, 63%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#6665DD#6665DD
HEX#6665DD
RGBrgb(102, 101, 221)
RGB (0–1)0.4, 0.3961, 0.8667
RGB percentages40%, 39.6%, 86.7%
HSLhsl(240.5, 63.8%, 63.1%)
HSV / HSBhsv(240.5, 54.3%, 86.7%)
CMYK53.8%, 54.3%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,710,749
CSS custom property--colour: #6665DD;

Brightness & contrast

Relative luminance0.17353WCAG 2.x, 0 is black and 1 is white
Perceived brightness121.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.7:1
Contrast with white4.7:1WCAG normal text: AA
Contrast with black4.47:1WCAG normal text: Fail
Greyscale equivalent#6E6E6E
Inverted#999A22

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1878E1no red cones; affects about 1% of men; ΔE 20.7 from the original
Deuteranopia#006FDAno green cones; the most common form, about 1% of men; ΔE 18.5 from the original
Tritanopia#2E8097no blue cones; rare, and affects men and women equally; ΔE 65.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.7:1WCAG large text: AAA
Contrast with black, large text4.47:1WCAG large text: AA

Named colours

Slate blue · ΔE 5.6Royal blue · ΔE 8.2Medium slateblue · ΔE 9.2Medium purple · ΔE 13.4Rebecca purple · ΔE 23.3Dodgerblue · ΔE 25.9
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 5.61, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DCDD65
Analogous#65A0DD, #A265DD
Triadic#DD6665, #65DD66
Split complementary#DDA265, #A0DD65
Tetradic#DD65A0, #DCDD65, #65DDA2

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E3E2F9
Lighter +20%#B9B9EF
Lighter +10%#908FE6
Darker −10%#3C3BD4
Darker −20%#2928B4
Darker −30%#1F1F8A
Darker −40%#161561
More saturated +25%#4F4DF5
Less saturated −25%#7D7CC5

Channel breakdown

R102
G101
B221
Red102 (40%)
Green101 (39.6%)
Blue221 (86.7%)
Hue240.5°
Saturation (HSL)63.83%
Lightness63.14%
Dominant channelBlue
Hex per channelR 66 · G 65 · B DD

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Every value on this page was computed from “6665dd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.