Colour

#0055BB

#0055BB
Blue
Dark
Nearest: Royal blue

#0055BB is a blue with RGB values 0, 85, 187 and HSL 213°, 100%, 37%. It is a dark colour, so white text on it reaches 7:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#0055BB#0055BB

HEX#0055BB

HEX (short)#05B

RGBrgb(0, 85, 187)

RGB (0–1)0, 0.3333, 0.7333

RGB percentages0%, 33.3%, 73.3%

HSLhsl(212.7, 100%, 36.7%)

HSV / HSBhsv(212.7, 100%, 73.3%)

CMYK100%, 54.5%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer21,947

CSS custom property--colour: #0055BB;

Brightness & contrast

Relative luminance0.10085WCAG 2.x, 0 is black and 1 is white

Perceived brightness90.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.96:1

Contrast with white6.96:1WCAG normal text: AA

Contrast with black3.02:1WCAG normal text: Fail

Greyscale equivalent#4A4A4A

Inverted#FFAA44

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0061BFno red cones; affects about 1% of men; ΔE 8.2 from the original

Deuteranopia#0052B9no green cones; the most common form, about 1% of men; ΔE 1.6 from the original

Tritanopia#006F7Fno blue cones; rare, and affects men and women equally; ΔE 59 from the original

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

Contrast with white, large text6.96:1WCAG large text: AAA

Contrast with black, large text3.02:1WCAG large text: AA

Named colours

Royal blue · ΔE 13.2 Slate blue · ΔE 18.1 Dark slateblue · ΔE 19.9 Dodgerblue · ΔE 23.8 Medium purple · ΔE 25.9 Medium slateblue · ΔE 26.4

Nearest named CSS colourRoyal blue (#4169E1)ΔE 13.23, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#BB6600

Analogous#00B2BB, #0900BB

Triadic#BB0055, #55BB00

Split complementary#BB0900, #B2BB00

Tetradic#BB00B2, #BB6600, #00BB09

Tints, shades & saturation

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

Lighter +40%#88BEFF

Lighter +30%#55A2FF

Lighter +20%#2286FF

Lighter +10%#006CEE

Darker −10%#003E88

Darker −20%#002755

Darker −30%#000F22

Darker −40%#000000

More saturated +25%#0055BB

Less saturated −25%#1757A4

Channel breakdown

G85

B187

Red0 (0%)

Green85 (33.3%)

Blue187 (73.3%)

Hue212.73°

Saturation (HSL)100%

Lightness36.67%

Dominant channelBlue

Hex per channelR 00 · G 55 · B BB

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#0055BB

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

Nerdulate something else