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Recognised as Colour

#668BC1

  • #668BC1
  • Blue
  • Dark
  • Nearest: Steel blue

#668BC1 is a blue with RGB values 102, 139, 193 and HSL 216°, 42%, 58%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#668BC1#668BC1
HEX#668BC1
RGBrgb(102, 139, 193)
RGB (0–1)0.4, 0.5451, 0.7569
RGB percentages40%, 54.5%, 75.7%
HSLhsl(215.6, 42.3%, 57.8%)
HSV / HSBhsv(215.6, 47.2%, 75.7%)
CMYK47.2%, 28%, 0%, 24.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,720,449
CSS custom property--colour: #668BC1;

Brightness & contrast

Relative luminance0.2514WCAG 2.x, 0 is black and 1 is white
Perceived brightness136.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.03:1
Contrast with white3.48:1WCAG normal text: Fail
Contrast with black6.03:1WCAG normal text: AA
Greyscale equivalent#878787
Inverted#99743E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#768EC3no red cones; affects about 1% of men; ΔE 4 from the original
Deuteranopia#6C85C0no green cones; the most common form, about 1% of men; ΔE 5.2 from the original
Tritanopia#40979Eno blue cones; rare, and affects men and women equally; ΔE 32.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.48:1WCAG large text: AA
Contrast with black, large text6.03:1WCAG large text: AAA

Named colours

Steel blue · ΔE 7.7Cornflower blue · ΔE 19.3Light slate grey · ΔE 21.4Slate grey · ΔE 22.3Light skyblue · ΔE 26.1Deep skyblue · ΔE 27
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.66, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C19C66
Analogous#66B8C1, #6F66C1
Triadic#C1668B, #8BC166
Split complementary#C16F66, #B8C166
Tetradic#C166B8, #C19C66, #66C16F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F7F9FC
Lighter +30%#D3DEED
Lighter +20%#AFC2DE
Lighter +10%#8AA7D0
Darker −10%#4670AE
Darker −20%#385989
Darker −30%#294165
Darker −40%#1A2A41
More saturated +25%#4B86DC
Less saturated −25%#8190A6

Channel breakdown

R102
G139
B193
Red102 (40%)
Green139 (54.5%)
Blue193 (75.7%)
Hue215.6°
Saturation (HSL)42.33%
Lightness57.84%
Dominant channelBlue
Hex per channelR 66 · G 8B · B C1

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Every value on this page was computed from “668bc1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.