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Colour

#1F00FF

  • #1F00FF
  • Blue
  • Dark
  • Nearest: Blue

#1F00FF is a blue with RGB values 31, 0, 255 and HSL 247°, 100%, 50%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Blue.

Colour values

#1F00FF#1F00FF
HEX#1F00FF
RGBrgb(31, 0, 255)
RGB (0–1)0.1216, 0, 1
RGB percentages12.2%, 0%, 100%
HSLhsl(247.3, 100%, 50%)
HSV / HSBhsv(247.3, 100%, 100%)
CMYK87.8%, 100%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,031,871
CSS custom property--colour: #1F00FF;

Brightness & contrast

Relative luminance0.07511WCAG 2.x, 0 is black and 1 is white
Perceived brightness87.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.39:1
Contrast with white8.39:1WCAG normal text: AAA
Contrast with black2.5:1WCAG normal text: Fail
Greyscale equivalent#191919
Inverted#E0FF00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0059FFno red cones; affects about 1% of men; ΔE 42.7 from the original
Deuteranopia#0040FBno green cones; the most common form, about 1% of men; ΔE 26.4 from the original
Tritanopia#006B96no blue cones; rare, and affects men and women equally; ΔE 117.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.39:1WCAG large text: AAA
Contrast with black, large text2.5:1WCAG large text: Fail

Named colours

Blue · ΔE 1.3Medium blue · ΔE 21.1Blue violet · ΔE 34.7Dark violet · ΔE 37.1Dark orchid · ΔE 49.9Dark blue · ΔE 51.2
Nearest named CSS colourBlue (#0000FF)ΔE 1.28, below the just-noticeable difference
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E0FF00
Analogous#0061FF, #9E00FF
Triadic#FF1F00, #00FF1F
Split complementary#FF9E00, #61FF00
Tetradic#FF0061, #E0FF00, #00FF9E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D2CCFF
Lighter +30%#A599FF
Lighter +20%#7966FF
Lighter +10%#4C33FF
Darker −10%#1900CC
Darker −20%#130099
Darker −30%#0C0066
Darker −40%#060033
More saturated +25%#1F00FF
Less saturated −25%#3720DF

Channel breakdown

R31
G0
B255
Red31 (12.2%)
Green0 (0%)
Blue255 (100%)
Hue247.29°
Saturation (HSL)100%
Lightness50%
Dominant channelBlue
Hex per channelR 1F · G 00 · B FF

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Every value on this page was computed from “1f00ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.