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Recognised as Colour

#555FD1

  • #555FD1
  • Blue
  • Dark
  • Nearest: Slate blue

#555FD1 is a blue with RGB values 85, 95, 209 and HSL 235°, 57%, 58%. It is a dark colour, so white text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#555FD1#555FD1
HEX#555FD1
RGBrgb(85, 95, 209)
RGB (0–1)0.3333, 0.3725, 0.8196
RGB percentages33.3%, 37.3%, 82%
HSLhsl(235.2, 57.4%, 57.6%)
HSV / HSBhsv(235.2, 59.3%, 82%)
CMYK59.3%, 54.5%, 0%, 18%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,595,089
CSS custom property--colour: #555FD1;

Brightness & contrast

Relative luminance0.14719WCAG 2.x, 0 is black and 1 is white
Perceived brightness111.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.32:1
Contrast with white5.32:1WCAG normal text: AA
Contrast with black3.94:1WCAG normal text: Fail
Greyscale equivalent#656565
Inverted#AAA02E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0C71D5no red cones; affects about 1% of men; ΔE 18.2 from the original
Deuteranopia#0066CFno green cones; the most common form, about 1% of men; ΔE 13.7 from the original
Tritanopia#007A8Fno blue cones; rare, and affects men and women equally; ΔE 65.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.32:1WCAG large text: AAA
Contrast with black, large text3.94:1WCAG large text: AA

Named colours

Slate blue · ΔE 6.4Royal blue · ΔE 6.8Medium slateblue · ΔE 13.9Medium purple · ΔE 15.6Rebecca purple · ΔE 22.1Dark slateblue · ΔE 23.6
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 6.44, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D1C755
Analogous#559DD1, #8955D1
Triadic#D1555F, #5FD155
Split complementary#D18955, #9DD155
Tetradic#D1559D, #D1C755, #55D189

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F6F6FC
Lighter +30%#CDD0F2
Lighter +20%#A5ABE7
Lighter +10%#7D85DC
Darker −10%#343FBF
Darker −20%#293297
Darker −30%#1E256F
Darker −40%#131747
More saturated +25%#3A48EC
Less saturated −25%#7076B6

Channel breakdown

R85
G95
B209
Red85 (33.3%)
Green95 (37.3%)
Blue209 (82%)
Hue235.16°
Saturation (HSL)57.41%
Lightness57.65%
Dominant channelBlue
Hex per channelR 55 · G 5F · B D1

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Every value on this page was computed from “555fd1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.