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Recognised as Colour

#255DFD

  • #255DFD
  • Blue
  • Dark
  • Nearest: Medium slateblue

#255DFD is a blue with RGB values 37, 93, 253 and HSL 224°, 98%, 57%. It is a dark colour, so white text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#255DFD#255DFD
HEX#255DFD
RGBrgb(37, 93, 253)
RGB (0–1)0.1451, 0.3647, 0.9922
RGB percentages14.5%, 36.5%, 99.2%
HSLhsl(224.4, 98.2%, 56.9%)
HSV / HSBhsv(224.4, 85.4%, 99.2%)
CMYK85.4%, 63.2%, 0%, 0.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,448,893
CSS custom property--colour: #255DFD;

Brightness & contrast

Relative luminance0.15314WCAG 2.x, 0 is black and 1 is white
Perceived brightness113.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.17:1
Contrast with white5.17:1WCAG normal text: AA
Contrast with black4.06:1WCAG normal text: Fail
Greyscale equivalent#5D5D5D
Inverted#DAA202

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0077FFno red cones; affects about 1% of men; ΔE 20.2 from the original
Deuteranopia#0063FAno green cones; the most common form, about 1% of men; ΔE 6.8 from the original
Tritanopia#0088A5no blue cones; rare, and affects men and women equally; ΔE 86.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.17:1WCAG large text: AAA
Contrast with black, large text4.06:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 19.5Royal blue · ΔE 24.1Slate blue · ΔE 26.7Blue violet · ΔE 30.2Dark orchid · ΔE 33.8Medium blue · ΔE 34.2
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 19.49, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FDC525
Analogous#25C9FD, #5925FD
Triadic#FD255D, #5DFD25
Split complementary#FD5925, #C9FD25
Tetradic#FD25C9, #FDC525, #25FD59

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EFF3FF
Lighter +30%#BDCEFE
Lighter +20%#8AA8FE
Lighter +10%#5883FD
Darker −10%#023FED
Darker −20%#0232BA
Darker −30%#012488
Darker −40%#011755
More saturated +25%#235CFF
Less saturated −25%#416AE2

Channel breakdown

R37
G93
B253
Red37 (14.5%)
Green93 (36.5%)
Blue253 (99.2%)
Hue224.44°
Saturation (HSL)98.18%
Lightness56.86%
Dominant channelBlue
Hex per channelR 25 · G 5D · B FD

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Every value on this page was computed from “255dfd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.