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Recognised as Colour

#31A3FB

  • #31A3FB
  • Blue
  • Dark
  • Nearest: Cornflower blue

#31A3FB is a blue with RGB values 49, 163, 251 and HSL 206°, 96%, 59%. It is a dark colour, so black text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#31A3FB#31A3FB
HEX#31A3FB
RGBrgb(49, 163, 251)
RGB (0–1)0.1922, 0.6392, 0.9843
RGB percentages19.2%, 63.9%, 98.4%
HSLhsl(206.1, 96.2%, 58.8%)
HSV / HSBhsv(206.1, 80.5%, 98.4%)
CMYK80.5%, 35.1%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,253,243
CSS custom property--colour: #31A3FB;

Brightness & contrast

Relative luminance0.33812WCAG 2.x, 0 is black and 1 is white
Perceived brightness153.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.76:1
Contrast with white2.71:1WCAG normal text: Fail
Contrast with black7.76:1WCAG normal text: AAA
Greyscale equivalent#919191
Inverted#CE5C04

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#79A7FFno red cones; affects about 1% of men; ΔE 11.6 from the original
Deuteranopia#5C95F9no green cones; the most common form, about 1% of men; ΔE 13.7 from the original
Tritanopia#00B8C3no blue cones; rare, and affects men and women equally; ΔE 48.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.71:1WCAG large text: Fail
Contrast with black, large text7.76:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.5Dodgerblue · ΔE 16.6Deep skyblue · ΔE 20.6Steel blue · ΔE 23.9Light skyblue · ΔE 29.8Royal blue · ΔE 34.8
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.5, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FB8931
Analogous#31FBEE, #313EFB
Triadic#FB31A3, #A3FB31
Split complementary#FB313E, #FBEE31
Tetradic#EE31FB, #FB8931, #3EFB31

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F9FCFF
Lighter +30%#C7E6FE
Lighter +20%#95D0FD
Lighter +10%#63B9FC
Darker −10%#058CF4
Darker −20%#046FC2
Darker −30%#035390
Darker −40%#02365E
More saturated +25%#2DA4FF
Less saturated −25%#4BA0E1

Channel breakdown

R49
G163
B251
Red49 (19.2%)
Green163 (63.9%)
Blue251 (98.4%)
Hue206.14°
Saturation (HSL)96.19%
Lightness58.82%
Dominant channelBlue
Hex per channelR 31 · G A3 · B FB

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Every value on this page was computed from “31a3fb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.