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Recognised as Colour

#688BD3

  • #688BD3
  • Blue
  • Dark
  • Nearest: Cornflower blue

#688BD3 is a blue with RGB values 104, 139, 211 and HSL 220°, 55%, 62%. It is a dark colour, so black text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#688BD3#688BD3
HEX#688BD3
RGBrgb(104, 139, 211)
RGB (0–1)0.4078, 0.5451, 0.8275
RGB percentages40.8%, 54.5%, 82.7%
HSLhsl(220.4, 54.9%, 61.8%)
HSV / HSBhsv(220.4, 50.7%, 82.7%)
CMYK50.7%, 34.1%, 0%, 17.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,851,539
CSS custom property--colour: #688BD3;

Brightness & contrast

Relative luminance0.26111WCAG 2.x, 0 is black and 1 is white
Perceived brightness140.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.22:1
Contrast with white3.37:1WCAG normal text: Fail
Contrast with black6.22:1WCAG normal text: AA
Greyscale equivalent#898989
Inverted#97742C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6F91D6no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#6387D1no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#369BA5no blue cones; rare, and affects men and women equally; ΔE 42.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.37:1WCAG large text: AA
Contrast with black, large text6.22:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 9.4Steel blue · ΔE 15.8Dodgerblue · ΔE 22.7Deep skyblue · ΔE 29.4Medium purple · ΔE 30.6Light skyblue · ΔE 31.1
Nearest named CSS colourCornflower blue (#6495ED)ΔE 9.43, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D3B068
Analogous#68C0D3, #7B68D3
Triadic#D3688B, #8BD368
Split complementary#D37B68, #C0D368
Tetradic#D368C0, #D3B068, #68D37B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DEE6F6
Lighter +20%#B7C8EA
Lighter +10%#8FA9DF
Darker −10%#416DC7
Darker −20%#3056A5
Darker −30%#25427D
Darker −40%#192D56
More saturated +25%#5083EB
Less saturated −25%#8093BB

Channel breakdown

R104
G139
B211
Red104 (40.8%)
Green139 (54.5%)
Blue211 (82.7%)
Hue220.37°
Saturation (HSL)54.87%
Lightness61.76%
Dominant channelBlue
Hex per channelR 68 · G 8B · B D3

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Every value on this page was computed from “688bd3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.