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Recognised as Colour

#1F77FF

  • #1F77FF
  • Blue
  • Dark
  • Nearest: Royal blue

#1F77FF is a blue with RGB values 31, 119, 255 and HSL 216°, 100%, 56%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#1F77FF#1F77FF
HEX#1F77FF
RGBrgb(31, 119, 255)
RGB (0–1)0.1216, 0.4667, 1
RGB percentages12.2%, 46.7%, 100%
HSLhsl(216.4, 100%, 56.1%)
HSV / HSBhsv(216.4, 87.8%, 100%)
CMYK87.8%, 53.3%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,062,335
CSS custom property--colour: #1F77FF;

Brightness & contrast

Relative luminance0.20705WCAG 2.x, 0 is black and 1 is white
Perceived brightness126.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.14:1
Contrast with white4.08:1WCAG normal text: Fail
Contrast with black5.14:1WCAG normal text: AA
Greyscale equivalent#6E6E6E
Inverted#E08800

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0088FFno red cones; affects about 1% of men; ΔE 14.2 from the original
Deuteranopia#0074FCno green cones; the most common form, about 1% of men; ΔE 1.5 from the original
Tritanopia#0099B0no blue cones; rare, and affects men and women equally; ΔE 73.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.08:1WCAG large text: AA
Contrast with black, large text5.14:1WCAG large text: AAA

Named colours

Royal blue · ΔE 10.3Medium slateblue · ΔE 18Dodgerblue · ΔE 20.1Slate blue · ΔE 20.9Medium purple · ΔE 26.8Cornflower blue · ΔE 31.2
Nearest named CSS colourRoyal blue (#4169E1)ΔE 10.26, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFA71F
Analogous#1FE7FF, #371FFF
Triadic#FF1F77, #77FF1F
Split complementary#FF371F, #E7FF1F
Tetradic#FF1FE7, #FFA71F, #1FFF37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EBF3FF
Lighter +30%#B8D4FF
Lighter +20%#85B5FF
Lighter +10%#5296FF
Darker −10%#005CEB
Darker −20%#0048B8
Darker −30%#003485
Darker −40%#002052
More saturated +25%#1F77FF
Less saturated −25%#3B7DE3

Channel breakdown

R31
G119
B255
Red31 (12.2%)
Green119 (46.7%)
Blue255 (100%)
Hue216.43°
Saturation (HSL)100%
Lightness56.08%
Dominant channelBlue
Hex per channelR 1F · G 77 · B FF

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Every value on this page was computed from “1f77ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.