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Recognised as Colour

#3691DF

  • #3691DF
  • Blue
  • Dark
  • Nearest: Cornflower blue

#3691DF is a blue with RGB values 54, 145, 223 and HSL 208°, 73%, 54%. It is a dark colour, so black text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#3691DF#3691DF
HEX#3691DF
RGBrgb(54, 145, 223)
RGB (0–1)0.2118, 0.5686, 0.8745
RGB percentages21.2%, 56.9%, 87.5%
HSLhsl(207.7, 72.5%, 54.3%)
HSV / HSBhsv(207.7, 75.8%, 87.5%)
CMYK75.8%, 35%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,576,287
CSS custom property--colour: #3691DF;

Brightness & contrast

Relative luminance0.26363WCAG 2.x, 0 is black and 1 is white
Perceived brightness137.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.27:1
Contrast with white3.35:1WCAG normal text: Fail
Contrast with black6.27:1WCAG normal text: AA
Greyscale equivalent#838383
Inverted#C96E20

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6D95E2no red cones; affects about 1% of men; ΔE 9.7 from the original
Deuteranopia#5485DDno green cones; the most common form, about 1% of men; ΔE 11.5 from the original
Tritanopia#00A4ADno blue cones; rare, and affects men and women equally; ΔE 45.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.35:1WCAG large text: AA
Contrast with black, large text6.27:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 10.6Steel blue · ΔE 16.6Dodgerblue · ΔE 19.2Deep skyblue · ΔE 22.8Light skyblue · ΔE 30.3Royal blue · ΔE 33.9
Nearest named CSS colourCornflower blue (#6495ED)ΔE 10.56, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DF8436
Analogous#36DFD9, #363CDF
Triadic#DF3691, #91DF36
Split complementary#DF363C, #DFD936
Tetradic#D936DF, #DF8436, #3CDF36

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E6F1FB
Lighter +30%#BAD9F4
Lighter +20%#8EC1ED
Lighter +10%#62A9E6
Darker −10%#1F77C3
Darker −20%#185C97
Darker −30%#11416B
Darker −40%#0A273F
More saturated +25%#1993FC
Less saturated −25%#538FC2

Channel breakdown

R54
G145
B223
Red54 (21.2%)
Green145 (56.9%)
Blue223 (87.5%)
Hue207.69°
Saturation (HSL)72.53%
Lightness54.31%
Dominant channelBlue
Hex per channelR 36 · G 91 · B DF

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Every value on this page was computed from “3691df” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.