Colour

#00337A

#00337A
Blue
Dark
Nearest: Dark slateblue

#00337A is a blue with RGB values 0, 51, 122 and HSL 215°, 100%, 24%. It is a dark colour, so white text on it reaches 12:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#00337A#00337A

HEX#00337A

RGBrgb(0, 51, 122)

RGB (0–1)0, 0.2, 0.4784

RGB percentages0%, 20%, 47.8%

HSLhsl(214.9, 100%, 23.9%)

HSV / HSBhsv(214.9, 100%, 47.8%)

CMYK100%, 58.2%, 0%, 52.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,178

CSS custom property--colour: #00337A;

Brightness & contrast

Relative luminance0.03773WCAG 2.x, 0 is black and 1 is white

Perceived brightness56.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 11.97:1

Contrast with white11.97:1WCAG normal text: AAA

Contrast with black1.75:1WCAG normal text: Fail

Greyscale equivalent#2D2D2D

Inverted#FFCC85

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#003C7Cno red cones; affects about 1% of men; ΔE 7.2 from the original

Deuteranopia#003279no green cones; the most common form, about 1% of men; ΔE 0.5 from the original

Tritanopia#004551no blue cones; rare, and affects men and women equally; ΔE 43.9 from the original

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

Contrast with white, large text11.97:1WCAG large text: AAA

Contrast with black, large text1.75:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.2 Midnight blue · ΔE 18.2 Rebecca purple · ΔE 29 Slate blue · ΔE 33 Royal blue · ΔE 34.1 Indigo · ΔE 37.1

Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.19, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#7A4700

Analogous#00707A, #0A007A

Triadic#7A0033, #337A00

Split complementary#7A0A00, #707A00

Tetradic#7A0070, #7A4700, #007A0A

Tints, shades & saturation

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

Lighter +40%#4794FF

Lighter +30%#1476FF

Lighter +20%#005EE0

Lighter +10%#0048AD

Darker −10%#001E47

Darker −20%#000814

Darker −30%#000000

Darker −40%#000000

More saturated +25%#00337A

Less saturated −25%#0F356B

Channel breakdown

G51

B122

Red0 (0%)

Green51 (20%)

Blue122 (47.8%)

Hue214.92°

Saturation (HSL)100%

Lightness23.92%

Dominant channelBlue

Hex per channelR 00 · G 33 · B 7A

Keep nerding

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#00337A

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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