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Colour

#1F73FF

  • #1F73FF
  • Blue
  • Dark
  • Nearest: Royal blue

#1F73FF is a blue with RGB values 31, 115, 255 and HSL 218°, 100%, 56%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#1F73FF#1F73FF
HEX#1F73FF
RGBrgb(31, 115, 255)
RGB (0–1)0.1216, 0.451, 1
RGB percentages12.2%, 45.1%, 100%
HSLhsl(217.5, 100%, 56.1%)
HSV / HSBhsv(217.5, 87.8%, 100%)
CMYK87.8%, 54.9%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,061,311
CSS custom property--colour: #1F73FF;

Brightness & contrast

Relative luminance0.19773WCAG 2.x, 0 is black and 1 is white
Perceived brightness124.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.95:1
Contrast with white4.24:1WCAG normal text: Fail
Contrast with black4.95:1WCAG normal text: AA
Greyscale equivalent#6B6B6B
Inverted#E08C00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0085FFno red cones; affects about 1% of men; ΔE 15 from the original
Deuteranopia#0071FCno green cones; the most common form, about 1% of men; ΔE 1.4 from the original
Tritanopia#0096AEno blue cones; rare, and affects men and women equally; ΔE 75.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.24:1WCAG large text: AA
Contrast with black, large text4.95:1WCAG large text: AAA

Named colours

Royal blue · ΔE 11.5Medium slateblue · ΔE 16.9Slate blue · ΔE 20.9Dodgerblue · ΔE 23.3Medium purple · ΔE 27.6Cornflower blue · ΔE 34.2
Nearest named CSS colourRoyal blue (#4169E1)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#FFAB1F
Analogous#1FE3FF, #3B1FFF
Triadic#FF1F73, #73FF1F
Split complementary#FF3B1F, #E3FF1F
Tetradic#FF1FE3, #FFAB1F, #1FFF3B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EBF3FF
Lighter +30%#B8D3FF
Lighter +20%#85B3FF
Lighter +10%#5293FF
Darker −10%#0058EB
Darker −20%#0045B8
Darker −30%#003285
Darker −40%#001F52
More saturated +25%#1F73FF
Less saturated −25%#3B7AE3

Channel breakdown

R31
G115
B255
Red31 (12.2%)
Green115 (45.1%)
Blue255 (100%)
Hue217.5°
Saturation (HSL)100%
Lightness56.08%
Dominant channelBlue
Hex per channelR 1F · G 73 · B FF

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Every value on this page was computed from “1f73ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.