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Recognised as Colour

#555AB7

  • #555AB7
  • Blue
  • Dark
  • Nearest: Dark slateblue

#555AB7 is a blue with RGB values 85, 90, 183 and HSL 237°, 40%, 53%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#555AB7#555AB7
HEX#555AB7
RGBrgb(85, 90, 183)
RGB (0–1)0.3333, 0.3529, 0.7176
RGB percentages33.3%, 35.3%, 71.8%
HSLhsl(236.9, 40.5%, 52.5%)
HSV / HSBhsv(236.9, 53.6%, 71.8%)
CMYK53.6%, 50.8%, 0%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,593,783
CSS custom property--colour: #555AB7;

Brightness & contrast

Relative luminance0.12663WCAG 2.x, 0 is black and 1 is white
Perceived brightness103.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.94:1
Contrast with white5.94:1WCAG normal text: AA
Contrast with black3.53:1WCAG normal text: Fail
Greyscale equivalent#606060
Inverted#AAA548

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2B68BAno red cones; affects about 1% of men; ΔE 15.2 from the original
Deuteranopia#1F60B5no green cones; the most common form, about 1% of men; ΔE 13.1 from the original
Tritanopia#286F80no blue cones; rare, and affects men and women equally; ΔE 53.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.94:1WCAG large text: AAA
Contrast with black, large text3.53:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 14Slate blue · ΔE 14.1Royal blue · ΔE 16.3Medium purple · ΔE 17.6Rebecca purple · ΔE 20.7Medium slateblue · ΔE 24.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B7B255
Analogous#558BB7, #8155B7
Triadic#B7555A, #5AB755
Split complementary#B78155, #8BB755
Tetradic#B7558B, #B7B255, #55B781

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E4E5F4
Lighter +30%#C0C2E5
Lighter +20%#9DA0D5
Lighter +10%#797DC6
Darker −10%#414598
Darker −20%#313575
Darker −30%#222551
Darker −40%#13142D
More saturated +25%#373FD5
Less saturated −25%#737599

Channel breakdown

R85
G90
B183
Red85 (33.3%)
Green90 (35.3%)
Blue183 (71.8%)
Hue236.94°
Saturation (HSL)40.5%
Lightness52.55%
Dominant channelBlue
Hex per channelR 55 · G 5A · B B7

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Every value on this page was computed from “555ab7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.