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Colour

#137BFB

  • #137BFB
  • Blue
  • Dark
  • Nearest: Royal blue

#137BFB is a blue with RGB values 19, 123, 251 and HSL 213°, 97%, 53%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#137BFB#137BFB
HEX#137BFB
RGBrgb(19, 123, 251)
RGB (0–1)0.0745, 0.4824, 0.9843
RGB percentages7.5%, 48.2%, 98.4%
HSLhsl(213.1, 96.7%, 52.9%)
HSV / HSBhsv(213.1, 92.4%, 98.4%)
CMYK92.4%, 51%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,276,923
CSS custom property--colour: #137BFB;

Brightness & contrast

Relative luminance0.21269WCAG 2.x, 0 is black and 1 is white
Perceived brightness127.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.25:1
Contrast with white4:1WCAG normal text: Fail
Contrast with black5.25:1WCAG normal text: AA
Greyscale equivalent#6E6E6E
Inverted#EC8404

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1C8AFFno red cones; affects about 1% of men; ΔE 10 from the original
Deuteranopia#0076F9no green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#009BAFno blue cones; rare, and affects men and women equally; ΔE 69.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4:1WCAG large text: AA
Contrast with black, large text5.25:1WCAG large text: AAA

Named colours

Royal blue · ΔE 9.6Dodgerblue · ΔE 14.7Medium slateblue · ΔE 21Slate blue · ΔE 21.7Cornflower blue · ΔE 26.1Medium purple · ΔE 26.4
Nearest named CSS colourRoyal blue (#4169E1)ΔE 9.61, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FB9313
Analogous#13EFFB, #1F13FB
Triadic#FB137B, #7BFB13
Split complementary#FB1F13, #EFFB13
Tetradic#FB13EF, #FB9313, #13FB1F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DCEBFE
Lighter +30%#A9CFFE
Lighter +20%#77B3FD
Lighter +10%#4597FC
Darker −10%#0463D7
Darker −20%#034CA5
Darker −30%#023573
Darker −40%#011E41
More saturated +25%#0F7BFF
Less saturated −25%#317EDD

Channel breakdown

R19
G123
B251
Red19 (7.5%)
Green123 (48.2%)
Blue251 (98.4%)
Hue213.1°
Saturation (HSL)96.67%
Lightness52.94%
Dominant channelBlue
Hex per channelR 13 · G 7B · B FB

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Every value on this page was computed from “137bfb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.