Colour

#001F55

#001F55
Blue
Dark
Nearest: Dark slateblue

#001F55 is a blue with RGB values 0, 31, 85 and HSL 218°, 100%, 17%. It is a dark colour, so white text on it reaches 15.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#001F55#001F55

HEX#001F55

RGBrgb(0, 31, 85)

RGB (0–1)0, 0.1216, 0.3333

RGB percentages0%, 12.2%, 33.3%

HSLhsl(218.1, 100%, 16.7%)

HSV / HSBhsv(218.1, 100%, 33.3%)

CMYK100%, 63.5%, 0%, 66.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer8,021

CSS custom property--colour: #001F55;

Brightness & contrast

Relative luminance0.01636WCAG 2.x, 0 is black and 1 is white

Perceived brightness37.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 15.82:1

Contrast with white15.82:1WCAG normal text: AAA

Contrast with black1.33:1WCAG normal text: Fail

Greyscale equivalent#1C1C1C

Inverted#FFE0AA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#002657no red cones; affects about 1% of men; ΔE 5.7 from the original

Deuteranopia#001F54no green cones; the most common form, about 1% of men; ΔE 0.7 from the original

Tritanopia#002D36no blue cones; rare, and affects men and women equally; ΔE 35.8 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text15.82:1WCAG large text: AAA

Contrast with black, large text1.33:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 22.1 Midnight blue · ΔE 22.6 Rebecca purple · ΔE 36.6 Black · ΔE 40.6 Indigo · ΔE 42.2 Steel blue · ΔE 43.2

Nearest named CSS colourDark slateblue (#483D8B)ΔE 22.08, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#553600

Analogous#004A55, #0C0055

Triadic#55001F, #1F5500

Split complementary#550C00, #495500

Tetradic#550049, #553600, #00550B

Tints, shades & saturation

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

Lighter +40%#2273FF

Lighter +30%#0057EE

Lighter +20%#0044BB

Lighter +10%#003288

Darker −10%#000C22

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#001F55

Less saturated −25%#0B224A

Channel breakdown

G31

B85

Red0 (0%)

Green31 (12.2%)

Blue85 (33.3%)

Hue218.12°

Saturation (HSL)100%

Lightness16.67%

Dominant channelBlue

Hex per channelR 00 · G 1F · B 55

Keep nerding

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#001F55

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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