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Recognised as Colour

#668DDA

  • #668DDA
  • Blue
  • Dark
  • Nearest: Cornflower blue

#668DDA is a blue with RGB values 102, 141, 218 and HSL 220°, 61%, 63%. It is a dark colour, so black text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#668DDA#668DDA
HEX#668DDA
RGBrgb(102, 141, 218)
RGB (0–1)0.4, 0.5529, 0.8549
RGB percentages40%, 55.3%, 85.5%
HSLhsl(219.8, 61.1%, 62.7%)
HSV / HSBhsv(219.8, 53.2%, 85.5%)
CMYK53.2%, 35.3%, 0%, 14.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,720,986
CSS custom property--colour: #668DDA;

Brightness & contrast

Relative luminance0.26936WCAG 2.x, 0 is black and 1 is white
Perceived brightness142.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.39:1
Contrast with white3.29:1WCAG normal text: Fail
Contrast with black6.39:1WCAG normal text: AA
Greyscale equivalent#8A8A8A
Inverted#997225

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6E94DDno red cones; affects about 1% of men; ΔE 3.6 from the original
Deuteranopia#6089D8no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#289EA9no blue cones; rare, and affects men and women equally; ΔE 45.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.29:1WCAG large text: AA
Contrast with black, large text6.39:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 6.6Steel blue · ΔE 18Dodgerblue · ΔE 20Medium purple · ΔE 29.4Deep skyblue · ΔE 29.4Royal blue · ΔE 30.2
Nearest named CSS colourCornflower blue (#6495ED)ΔE 6.6, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DAB366
Analogous#66C7DA, #7966DA
Triadic#DA668D, #8DDA66
Split complementary#DA7966, #C7DA66
Tetradic#DA66C7, #DAB366, #66DA79

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E1E9F8
Lighter +20%#B8CAEE
Lighter +10%#8FACE4
Darker −10%#3D6ED0
Darker −20%#2A57B0
Darker −30%#214386
Darker −40%#172E5D
More saturated +25%#4E85F2
Less saturated −25%#7E95C2

Channel breakdown

R102
G141
B218
Red102 (40%)
Green141 (55.3%)
Blue218 (85.5%)
Hue219.83°
Saturation (HSL)61.05%
Lightness62.75%
Dominant channelBlue
Hex per channelR 66 · G 8D · B DA

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Every value on this page was computed from “668dda” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.