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Colour

#688BC6

  • #688BC6
  • Blue
  • Dark
  • Nearest: Steel blue

#688BC6 is a blue with RGB values 104, 139, 198 and HSL 218°, 45%, 59%. It is a dark colour, so black text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#688BC6#688BC6
HEX#688BC6
RGBrgb(104, 139, 198)
RGB (0–1)0.4078, 0.5451, 0.7765
RGB percentages40.8%, 54.5%, 77.6%
HSLhsl(217.7, 45.2%, 59.2%)
HSV / HSBhsv(217.7, 47.5%, 77.6%)
CMYK47.5%, 29.8%, 0%, 22.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,851,526
CSS custom property--colour: #688BC6;

Brightness & contrast

Relative luminance0.25486WCAG 2.x, 0 is black and 1 is white
Perceived brightness138 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.1:1
Contrast with white3.44:1WCAG normal text: Fail
Contrast with black6.1:1WCAG normal text: AA
Greyscale equivalent#888888
Inverted#977439

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#758FC9no red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#6A86C5no green cones; the most common form, about 1% of men; ΔE 3.7 from the original
Tritanopia#4198A0no blue cones; rare, and affects men and women equally; ΔE 35.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.44:1WCAG large text: AA
Contrast with black, large text6.1:1WCAG large text: AAA

Named colours

Steel blue · ΔE 9.7Cornflower blue · ΔE 16.4Light slate grey · ΔE 24.1Slate grey · ΔE 25Light skyblue · ΔE 27.3Deep skyblue · ΔE 27.5
Nearest named CSS colourSteel blue (#4682B4)ΔE 9.73, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C6A368
Analogous#68BAC6, #7468C6
Triadic#C6688B, #8BC668
Split complementary#C67468, #BAC668
Tetradic#C668BA, #C6A368, #68C674

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FCFDFE
Lighter +30%#D7E0F0
Lighter +20%#B2C4E2
Lighter +10%#8DA7D4
Darker −10%#456FB6
Darker −20%#375891
Darker −30%#29426C
Darker −40%#1B2B47
More saturated +25%#4E84E0
Less saturated −25%#8292AC

Channel breakdown

R104
G139
B198
Red104 (40.8%)
Green139 (54.5%)
Blue198 (77.6%)
Hue217.66°
Saturation (HSL)45.19%
Lightness59.22%
Dominant channelBlue
Hex per channelR 68 · G 8B · B C6

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Every value on this page was computed from “688bc6” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.