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Colour

#1F91FF

  • #1F91FF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#1F91FF is a blue with RGB values 31, 145, 255 and HSL 209°, 100%, 56%. It is a dark colour, so black text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#1F91FF#1F91FF
HEX#1F91FF
RGBrgb(31, 145, 255)
RGB (0–1)0.1216, 0.5686, 1
RGB percentages12.2%, 56.9%, 100%
HSLhsl(209.5, 100%, 56.1%)
HSV / HSBhsv(209.5, 87.8%, 100%)
CMYK87.8%, 43.1%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,068,991
CSS custom property--colour: #1F91FF;

Brightness & contrast

Relative luminance0.27762WCAG 2.x, 0 is black and 1 is white
Perceived brightness141.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.55:1
Contrast with white3.2:1WCAG normal text: Fail
Contrast with black6.55:1WCAG normal text: AA
Greyscale equivalent#818181
Inverted#E06E00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#579AFFno red cones; affects about 1% of men; ΔE 7.6 from the original
Deuteranopia#2887FDno green cones; the most common form, about 1% of men; ΔE 7.3 from the original
Tritanopia#00ACBBno blue cones; rare, and affects men and women equally; ΔE 60.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.2:1WCAG large text: AA
Contrast with black, large text6.55:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 0.8Cornflower blue · ΔE 13.8Royal blue · ΔE 20.7Medium purple · ΔE 30.6Slate blue · ΔE 30.7Medium slateblue · ΔE 32.6
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 0.78, indistinguishable to the eye
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF8D1F
Analogous#1FFFFD, #1F21FF
Triadic#FF1F91, #91FF1F
Split complementary#FF1F21, #FFFD1F
Tetradic#FD1FFF, #FF8D1F, #21FF1F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EBF5FF
Lighter +30%#B8DCFF
Lighter +20%#85C3FF
Lighter +10%#52AAFF
Darker −10%#0078EB
Darker −20%#005EB8
Darker −30%#004485
Darker −40%#002A52
More saturated +25%#1F91FF
Less saturated −25%#3B90E3

Channel breakdown

R31
G145
B255
Red31 (12.2%)
Green145 (56.9%)
Blue255 (100%)
Hue209.46°
Saturation (HSL)100%
Lightness56.08%
Dominant channelBlue
Hex per channelR 1F · G 91 · B FF

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Every value on this page was computed from “1f91ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.