Colour

#0031BB

#0031BB
Blue
Dark
Nearest: Dark blue

#0031BB is a blue with RGB values 0, 49, 187 and HSL 224°, 100%, 37%. It is a dark colour, so white text on it reaches 9.7:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#0031BB#0031BB

HEX#0031BB

RGBrgb(0, 49, 187)

RGB (0–1)0, 0.1922, 0.7333

RGB percentages0%, 19.2%, 73.3%

HSLhsl(224.3, 100%, 36.7%)

HSV / HSBhsv(224.3, 100%, 73.3%)

CMYK100%, 73.8%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,731

CSS custom property--colour: #0031BB;

Brightness & contrast

Relative luminance0.05784WCAG 2.x, 0 is black and 1 is white

Perceived brightness73.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 9.74:1

Contrast with white9.74:1WCAG normal text: AAA

Contrast with black2.16:1WCAG normal text: Fail

Greyscale equivalent#313131

Inverted#FFCE44

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#004DBFno red cones; affects about 1% of men; ΔE 20.5 from the original

Deuteranopia#003BB9no green cones; the most common form, about 1% of men; ΔE 8.7 from the original

Tritanopia#005A73no blue cones; rare, and affects men and women equally; ΔE 78.2 from the original

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

Contrast with white, large text9.74:1WCAG large text: AAA

Contrast with black, large text2.16:1WCAG large text: Fail

Named colours

Dark blue · ΔE 16.9 Navy · ΔE 19.1 Indigo · ΔE 24.3 Slate blue · ΔE 24.5 Medium slateblue · ΔE 25.1 Royal blue · ΔE 27

Nearest named CSS colourDark blue (#00008B)ΔE 16.86, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#BB8A00

Analogous#008FBB, #2C00BB

Triadic#BB0031, #31BB00

Split complementary#BB2C00, #8FBB00

Tetradic#BB008F, #BB8A00, #00BB2C

Tints, shades & saturation

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

Lighter +40%#88A7FF

Lighter +30%#5582FF

Lighter +20%#225CFF

Lighter +10%#003EEE

Darker −10%#002488

Darker −20%#001655

Darker −30%#000922

Darker −40%#000000

More saturated +25%#0031BB

Less saturated −25%#173CA4

Channel breakdown

G49

B187

Red0 (0%)

Green49 (19.2%)

Blue187 (73.3%)

Hue224.28°

Saturation (HSL)100%

Lightness36.67%

Dominant channelBlue

Hex per channelR 00 · G 31 · B BB

Keep nerding

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

#0031BB

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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