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Recognised as Colour

#555CFF

  • #555CFF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#555CFF is a blue with RGB values 85, 92, 255 and HSL 238°, 100%, 67%. It is a dark colour, so white text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#555CFF#555CFF
HEX#555CFF
RGBrgb(85, 92, 255)
RGB (0–1)0.3333, 0.3608, 1
RGB percentages33.3%, 36.1%, 100%
HSLhsl(237.5, 100%, 66.7%)
HSV / HSBhsv(237.5, 66.7%, 100%)
CMYK66.7%, 63.9%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,594,367
CSS custom property--colour: #555CFF;

Brightness & contrast

Relative luminance0.16806WCAG 2.x, 0 is black and 1 is white
Perceived brightness120.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.82:1
Contrast with white4.82:1WCAG normal text: AA
Contrast with black4.36:1WCAG normal text: Fail
Greyscale equivalent#666666
Inverted#AAA300

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#007AFFno red cones; affects about 1% of men; ΔE 26.4 from the original
Deuteranopia#006AFCno green cones; the most common form, about 1% of men; ΔE 15.8 from the original
Tritanopia#0086A5no blue cones; rare, and affects men and women equally; ΔE 87.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.82:1WCAG large text: AAA
Contrast with black, large text4.36:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 17.9Blue violet · ΔE 24.5Slate blue · ΔE 26.5Royal blue · ΔE 26.5Dark orchid · ΔE 28.6Medium blue · ΔE 32.1
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 17.89, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFF855
Analogous#55B1FF, #A355FF
Triadic#FF555C, #5CFF55
Split complementary#FFA355, #B1FF55
Tetradic#FF55B1, #FFF855, #55FFA3

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EEEFFF
Lighter +20%#BBBEFF
Lighter +10%#888DFF
Darker −10%#222BFF
Darker −20%#000AEE
Darker −30%#0008BB
Darker −40%#000688
More saturated +25%#555CFF
Less saturated −25%#6A6FEA

Channel breakdown

R85
G92
B255
Red85 (33.3%)
Green92 (36.1%)
Blue255 (100%)
Hue237.53°
Saturation (HSL)100%
Lightness66.67%
Dominant channelBlue
Hex per channelR 55 · G 5C · B FF

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Every value on this page was computed from “555cff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.