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Recognised as Colour

#688EC4

  • #688EC4
  • Blue
  • Dark
  • Nearest: Steel blue

#688EC4 is a blue with RGB values 104, 142, 196 and HSL 215°, 44%, 59%. It is a dark colour, so black text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#688EC4#688EC4
HEX#688EC4
RGBrgb(104, 142, 196)
RGB (0–1)0.4078, 0.5569, 0.7686
RGB percentages40.8%, 55.7%, 76.9%
HSLhsl(215.2, 43.8%, 58.8%)
HSV / HSBhsv(215.2, 46.9%, 76.9%)
CMYK46.9%, 27.6%, 0%, 23.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,852,292
CSS custom property--colour: #688EC4;

Brightness & contrast

Relative luminance0.26275WCAG 2.x, 0 is black and 1 is white
Perceived brightness139.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.25:1
Contrast with white3.36:1WCAG normal text: Fail
Contrast with black6.25:1WCAG normal text: AA
Greyscale equivalent#8A8A8A
Inverted#97713B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7991C6no red cones; affects about 1% of men; ΔE 4.3 from the original
Deuteranopia#6F88C3no green cones; the most common form, about 1% of men; ΔE 5.3 from the original
Tritanopia#429AA1no blue cones; rare, and affects men and women equally; ΔE 32.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.36:1WCAG large text: AA
Contrast with black, large text6.25:1WCAG large text: AAA

Named colours

Steel blue · ΔE 8.1Cornflower blue · ΔE 19.2Light slate grey · ΔE 21.5Slate grey · ΔE 22.5Light skyblue · ΔE 25Deep skyblue · ΔE 26.1
Nearest named CSS colourSteel blue (#4682B4)ΔE 8.12, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C49E68
Analogous#68BCC4, #7068C4
Triadic#C4688E, #8EC468
Split complementary#C47068, #BCC468
Tetradic#C468BC, #C49E68, #68C470

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FBFCFD
Lighter +30%#D6E0EF
Lighter +20%#B1C5E1
Lighter +10%#8DA9D2
Darker −10%#4673B3
Darker −20%#385B8E
Darker −30%#29446A
Darker −40%#1B2C45
More saturated +25%#4E89DE
Less saturated −25%#8293AA

Channel breakdown

R104
G142
B196
Red104 (40.8%)
Green142 (55.7%)
Blue196 (76.9%)
Hue215.22°
Saturation (HSL)43.81%
Lightness58.82%
Dominant channelBlue
Hex per channelR 68 · G 8E · B C4

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Every value on this page was computed from “688ec4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.