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Recognised as Colour

#31B9FF

  • #31B9FF
  • Blue
  • Dark
  • Nearest: Deep skyblue

#31B9FF is a blue with RGB values 49, 185, 255 and HSL 200°, 100%, 60%. It is a dark colour, so black text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#31B9FF#31B9FF
HEX#31B9FF
RGBrgb(49, 185, 255)
RGB (0–1)0.1922, 0.7255, 1
RGB percentages19.2%, 72.5%, 100%
HSLhsl(200.4, 100%, 59.6%)
HSV / HSBhsv(200.4, 80.8%, 100%)
CMYK80.8%, 27.5%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,258,879
CSS custom property--colour: #31B9FF;

Brightness & contrast

Relative luminance0.42571WCAG 2.x, 0 is black and 1 is white
Perceived brightness168 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.51:1
Contrast with white2.21:1WCAG normal text: Fail
Contrast with black9.51:1WCAG normal text: AAA
Greyscale equivalent#A1A1A1
Inverted#CE4600

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#97B9FFno red cones; affects about 1% of men; ΔE 19.4 from the original
Deuteranopia#7CA6FEno green cones; the most common form, about 1% of men; ΔE 22.4 from the original
Tritanopia#00CBD1no blue cones; rare, and affects men and women equally; ΔE 39.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.21:1WCAG large text: Fail
Contrast with black, large text9.51:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 6Light skyblue · ΔE 18.2Steel blue · ΔE 23.9Cornflower blue · ΔE 23.9Sky blue · ΔE 24.7Dodgerblue · ΔE 31.4
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 5.98, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF7731
Analogous#31FFDE, #3152FF
Triadic#FF31B9, #B9FF31
Split complementary#FF3152, #FFDE31
Tetradic#DE31FF, #FF7731, #52FF31

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FDFEFF
Lighter +30%#CAEDFF
Lighter +20%#97DCFF
Lighter +10%#64CAFF
Darker −10%#00A7FD
Darker −20%#0085CA
Darker −30%#006497
Darker −40%#004264
More saturated +25%#31B9FF
Less saturated −25%#4BB1E5

Channel breakdown

R49
G185
B255
Red49 (19.2%)
Green185 (72.5%)
Blue255 (100%)
Hue200.39°
Saturation (HSL)100%
Lightness59.61%
Dominant channelBlue
Hex per channelR 31 · G B9 · B FF

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Every value on this page was computed from “31b9ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.