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Recognised as Colour

#556DFE

  • #556DFE
  • Blue
  • Dark
  • Nearest: Medium slateblue

#556DFE is a blue with RGB values 85, 109, 254 and HSL 231°, 99%, 66%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#556DFE#556DFE
HEX#556DFE
RGBrgb(85, 109, 254)
RGB (0–1)0.3333, 0.4275, 0.9961
RGB percentages33.3%, 42.7%, 99.6%
HSLhsl(231.5, 98.8%, 66.5%)
HSV / HSBhsv(231.5, 66.5%, 99.6%)
CMYK66.5%, 57.1%, 0%, 0.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,598,718
CSS custom property--colour: #556DFE;

Brightness & contrast

Relative luminance0.20024WCAG 2.x, 0 is black and 1 is white
Perceived brightness128.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5:1
Contrast with white4.2:1WCAG normal text: Fail
Contrast with black5:1WCAG normal text: AA
Greyscale equivalent#727272
Inverted#AA9201

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0084FFno red cones; affects about 1% of men; ΔE 21.4 from the original
Deuteranopia#0074FBno green cones; the most common form, about 1% of men; ΔE 11.8 from the original
Tritanopia#0091ABno blue cones; rare, and affects men and women equally; ΔE 79.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.2:1WCAG large text: AA
Contrast with black, large text5:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 10.5Royal blue · ΔE 14.7Slate blue · ΔE 18.3Medium purple · ΔE 25Dodgerblue · ΔE 30Dark orchid · ΔE 33.3
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 10.51, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FEE655
Analogous#55C2FE, #9155FE
Triadic#FE556D, #6DFE55
Split complementary#FE9155, #C2FE55
Tetradic#FE55C2, #FEE655, #55FE91

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EDF0FF
Lighter +20%#BAC4FF
Lighter +10%#8899FE
Darker −10%#2241FE
Darker −20%#0123EC
Darker −30%#011BB9
Darker −40%#011486
More saturated +25%#546CFF
Less saturated −25%#6A7CE9

Channel breakdown

R85
G109
B254
Red85 (33.3%)
Green109 (42.7%)
Blue254 (99.6%)
Hue231.48°
Saturation (HSL)98.83%
Lightness66.47%
Dominant channelBlue
Hex per channelR 55 · G 6D · B FE

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Every value on this page was computed from “556dfe” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.