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Colour

#688AD3

  • #688AD3
  • Blue
  • Dark
  • Nearest: Cornflower blue

#688AD3 is a blue with RGB values 104, 138, 211 and HSL 221°, 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

#688AD3#688AD3
HEX#688AD3
RGBrgb(104, 138, 211)
RGB (0–1)0.4078, 0.5412, 0.8275
RGB percentages40.8%, 54.1%, 82.7%
HSLhsl(220.9, 54.9%, 61.8%)
HSV / HSBhsv(220.9, 50.7%, 82.7%)
CMYK50.7%, 34.6%, 0%, 17.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,851,283
CSS custom property--colour: #688AD3;

Brightness & contrast

Relative luminance0.25823WCAG 2.x, 0 is black and 1 is white
Perceived brightness139.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.16:1
Contrast with white3.41:1WCAG normal text: Fail
Contrast with black6.16:1WCAG normal text: AA
Greyscale equivalent#888888
Inverted#97752C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6E90D6no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#6287D1no green cones; the most common form, about 1% of men; ΔE 1.5 from the original
Tritanopia#379AA5no blue cones; rare, and affects men and women equally; ΔE 42.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.41:1WCAG large text: AA
Contrast with black, large text6.16:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 9.1Steel blue · ΔE 16.4Dodgerblue · ΔE 22.3Medium purple · ΔE 29.8Deep skyblue · ΔE 30Royal blue · ΔE 31.6
Nearest named CSS colourCornflower blue (#6495ED)ΔE 9.08, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D3B168
Analogous#68BFD3, #7C68D3
Triadic#D3688A, #8AD368
Split complementary#D37C68, #BFD368
Tetradic#D368BF, #D3B168, #68D37C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DEE6F6
Lighter +20%#B7C7EA
Lighter +10%#8FA9DF
Darker −10%#416BC7
Darker −20%#3055A5
Darker −30%#25417D
Darker −40%#192C56
More saturated +25%#5081EB
Less saturated −25%#8093BB

Channel breakdown

R104
G138
B211
Red104 (40.8%)
Green138 (54.1%)
Blue211 (82.7%)
Hue220.93°
Saturation (HSL)54.87%
Lightness61.76%
Dominant channelBlue
Hex per channelR 68 · G 8A · B D3

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Every value on this page was computed from “688ad3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.