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Recognised as Colour

#5566CF

  • #5566CF
  • Blue
  • Dark
  • Nearest: Royal blue

#5566CF is a blue with RGB values 85, 102, 207 and HSL 232°, 56%, 57%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#5566CF#5566CF
HEX#5566CF
RGBrgb(85, 102, 207)
RGB (0–1)0.3333, 0.4, 0.8118
RGB percentages33.3%, 40%, 81.2%
HSLhsl(231.6, 56%, 57.3%)
HSV / HSBhsv(231.6, 58.9%, 81.2%)
CMYK58.9%, 50.7%, 0%, 18.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,596,879
CSS custom property--colour: #5566CF;

Brightness & contrast

Relative luminance0.15939WCAG 2.x, 0 is black and 1 is white
Perceived brightness114.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.01:1
Contrast with white5.01:1WCAG normal text: AA
Contrast with black4.19:1WCAG normal text: Fail
Greyscale equivalent#6A6A6A
Inverted#AA9930

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2D75D3no red cones; affects about 1% of men; ΔE 14.3 from the original
Deuteranopia#116ACDno green cones; the most common form, about 1% of men; ΔE 11.6 from the original
Tritanopia#007E91no blue cones; rare, and affects men and women equally; ΔE 60.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.01:1WCAG large text: AAA
Contrast with black, large text4.19:1WCAG large text: AA

Named colours

Royal blue · ΔE 8.9Slate blue · ΔE 11.1Medium purple · ΔE 15.6Medium slateblue · ΔE 19Dodgerblue · ΔE 20.8Dark slateblue · ΔE 21.6
Nearest named CSS colourRoyal blue (#4169E1)ΔE 8.9, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CFBE55
Analogous#55A3CF, #8155CF
Triadic#CF5566, #66CF55
Split complementary#CF8155, #A3CF55
Tetradic#CF55A3, #CFBE55, #55CF81

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F4F5FC
Lighter +30%#CCD1F1
Lighter +20%#A5AEE5
Lighter +10%#7D8ADA
Darker −10%#3548BC
Darker −20%#2A3994
Darker −30%#1F296C
Darker −40%#131A45
More saturated +25%#3A52EA
Less saturated −25%#707AB4

Channel breakdown

R85
G102
B207
Red85 (33.3%)
Green102 (40%)
Blue207 (81.2%)
Hue231.64°
Saturation (HSL)55.96%
Lightness57.25%
Dominant channelBlue
Hex per channelR 55 · G 66 · B CF

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Every value on this page was computed from “5566cf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.