Colour

#0055CC

#0055CC
Blue
Dark
Nearest: Royal blue

#0055CC is a blue with RGB values 0, 85, 204 and HSL 215°, 100%, 40%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#0055CC#0055CC

HEX#0055CC

HEX (short)#05C

RGBrgb(0, 85, 204)

RGB (0–1)0, 0.3333, 0.8

RGB percentages0%, 33.3%, 80%

HSLhsl(215, 100%, 40%)

HSV / HSBhsv(215, 100%, 80%)

CMYK100%, 58.3%, 0%, 20%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer21,964

CSS custom property--colour: #0055CC;

Brightness & contrast

Relative luminance0.10857WCAG 2.x, 0 is black and 1 is white

Perceived brightness94.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.62:1

Contrast with white6.62:1WCAG normal text: AA

Contrast with black3.17:1WCAG normal text: Fail

Greyscale equivalent#4C4C4C

Inverted#FFAA33

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0065D0no red cones; affects about 1% of men; ΔE 11.4 from the original

Deuteranopia#0054CAno green cones; the most common form, about 1% of men; ΔE 0.6 from the original

Tritanopia#007488no blue cones; rare, and affects men and women equally; ΔE 67.3 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text6.62:1WCAG large text: AAA

Contrast with black, large text3.17:1WCAG large text: AA

Named colours

Royal blue · ΔE 8.7 Slate blue · ΔE 14.7 Medium slateblue · ΔE 19.5 Medium purple · ΔE 25.4 Dodgerblue · ΔE 26.2 Dark slateblue · ΔE 26.5

Nearest named CSS colourRoyal blue (#4169E1)ΔE 8.7, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#CC7700

Analogous#00BBCC, #1100CC

Triadic#CC0055, #55CC00

Split complementary#CC1100, #BBCC00

Tetradic#CC00BB, #CC7700, #00CC11

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#99C3FF

Lighter +30%#66A6FF

Lighter +20%#3388FF

Lighter +10%#006AFF

Darker −10%#004099

Darker −20%#002A66

Darker −30%#001533

Darker −40%#000000

More saturated +25%#0055CC

Less saturated −25%#1959B3

Channel breakdown

G85

B204

Red0 (0%)

Green85 (33.3%)

Blue204 (80%)

Hue215°

Saturation (HSL)100%

Lightness40%

Dominant channelBlue

Hex per channelR 00 · G 55 · B CC

Keep nerding

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#0055CC

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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