Colour

#0047AB

#0047AB
Blue
Dark
Nearest: Dark slateblue

#0047AB is a blue with RGB values 0, 71, 171 and HSL 215°, 100%, 34%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#0047AB#0047AB

HEX#0047AB

RGBrgb(0, 71, 171)

RGB (0–1)0, 0.2784, 0.6706

RGB percentages0%, 27.8%, 67.1%

HSLhsl(215.1, 100%, 33.5%)

HSV / HSBhsv(215.1, 100%, 67.1%)

CMYK100%, 58.5%, 0%, 32.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer18,347

CSS custom property--colour: #0047AB;

Brightness & contrast

Relative luminance0.07447WCAG 2.x, 0 is black and 1 is white

Perceived brightness79.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 8.44:1

Contrast with white8.44:1WCAG normal text: AAA

Contrast with black2.49:1WCAG normal text: Fail

Greyscale equivalent#3F3F3F

Inverted#FFB854

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0055AEno red cones; affects about 1% of men; ΔE 10.6 from the original

Deuteranopia#0046A9no green cones; the most common form, about 1% of men; ΔE 0.7 from the original

Tritanopia#006172no blue cones; rare, and affects men and women equally; ΔE 58.2 from the original

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

Contrast with white, large text8.44:1WCAG large text: AAA

Contrast with black, large text2.49:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 16.9 Royal blue · ΔE 16.9 Slate blue · ΔE 18.5 Midnight blue · ΔE 21.2 Rebecca purple · ΔE 23.3 Medium purple · ΔE 27.7

Nearest named CSS colourDark slateblue (#483D8B)ΔE 16.85, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#AB6400

Analogous#009DAB, #0E00AB

Triadic#AB0047, #47AB00

Split complementary#AB0E00, #9DAB00

Tetradic#AB009D, #AB6400, #00AB0E

Tints, shades & saturation

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

Lighter +40%#78B0FF

Lighter +30%#4592FF

Lighter +20%#1274FF

Lighter +10%#005CDE

Darker −10%#003278

Darker −20%#001D45

Darker −30%#000712

Darker −40%#000000

More saturated +25%#0047AB

Less saturated −25%#154B96

Channel breakdown

G71

B171

Red0 (0%)

Green71 (27.8%)

Blue171 (67.1%)

Hue215.09°

Saturation (HSL)100%

Lightness33.53%

Dominant channelBlue

Hex per channelR 00 · G 47 · B AB

Keep nerding

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#0047AB

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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