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Recognised as Colour

#668AC1

  • #668AC1
  • Blue
  • Dark
  • Nearest: Steel blue

#668AC1 is a blue with RGB values 102, 138, 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

#668AC1#668AC1
HEX#668AC1
RGBrgb(102, 138, 193)
RGB (0–1)0.4, 0.5412, 0.7569
RGB percentages40%, 54.1%, 75.7%
HSLhsl(216.3, 42.3%, 57.8%)
HSV / HSBhsv(216.3, 47.2%, 75.7%)
CMYK47.2%, 28.5%, 0%, 24.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,720,193
CSS custom property--colour: #668AC1;

Brightness & contrast

Relative luminance0.24852WCAG 2.x, 0 is black and 1 is white
Perceived brightness136.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.97:1
Contrast with white3.52:1WCAG normal text: Fail
Contrast with black5.97:1WCAG normal text: AA
Greyscale equivalent#868686
Inverted#99753E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#758DC3no red cones; affects about 1% of men; ΔE 3.7 from the original
Deuteranopia#6B85C0no green cones; the most common form, about 1% of men; ΔE 4.2 from the original
Tritanopia#40969Dno blue cones; rare, and affects men and women equally; ΔE 33.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.52:1WCAG large text: AA
Contrast with black, large text5.97:1WCAG large text: AAA

Named colours

Steel blue · ΔE 8Cornflower blue · ΔE 18.8Light slate grey · ΔE 22Slate grey · ΔE 22.8Light skyblue · ΔE 26.7Deep skyblue · ΔE 27.4
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.97, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C19D66
Analogous#66B7C1, #7066C1
Triadic#C1668A, #8AC166
Split complementary#C17066, #B7C166
Tetradic#C166B7, #C19D66, #66C170

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F7F9FC
Lighter +30%#D3DDED
Lighter +20%#AFC2DE
Lighter +10%#8AA6D0
Darker −10%#466FAE
Darker −20%#385889
Darker −30%#294165
Darker −40%#1A2941
More saturated +25%#4B84DC
Less saturated −25%#8190A6

Channel breakdown

R102
G138
B193
Red102 (40%)
Green138 (54.1%)
Blue193 (75.7%)
Hue216.26°
Saturation (HSL)42.33%
Lightness57.84%
Dominant channelBlue
Hex per channelR 66 · G 8A · B C1

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Every value on this page was computed from “668ac1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.