Colour

#001B58

#001B58
Blue
Dark
Nearest: Midnight blue

#001B58 is a blue with RGB values 0, 27, 88 and HSL 222°, 100%, 17%. It is a dark colour, so white text on it reaches 16.2:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#001B58#001B58

HEX#001B58

RGBrgb(0, 27, 88)

RGB (0–1)0, 0.1059, 0.3451

RGB percentages0%, 10.6%, 34.5%

HSLhsl(221.6, 100%, 17.3%)

HSV / HSBhsv(221.6, 100%, 34.5%)

CMYK100%, 69.3%, 0%, 65.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer7,000

CSS custom property--colour: #001B58;

Brightness & contrast

Relative luminance0.01488WCAG 2.x, 0 is black and 1 is white

Perceived brightness36.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.18:1

Contrast with white16.18:1WCAG normal text: AAA

Contrast with black1.3:1WCAG normal text: Fail

Greyscale equivalent#1A1A1A

Inverted#FFE4A7

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#00255Ano red cones; affects about 1% of men; ΔE 8.5 from the original

Deuteranopia#001D57no green cones; the most common form, about 1% of men; ΔE 2.5 from the original

Tritanopia#002B36no blue cones; rare, and affects men and women equally; ΔE 39.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text16.18:1WCAG large text: AAA

Contrast with black, large text1.3:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 17.1 Dark slateblue · ΔE 20 Rebecca purple · ΔE 32.8 Indigo · ΔE 36.9 Navy · ΔE 38.6 Slate blue · ΔE 41.6

Nearest named CSS colourMidnight blue (#191970)ΔE 17.13, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#583D00

Analogous#004758, #110058

Triadic#58001B, #1B5800

Split complementary#581100, #475800

Tetradic#580047, #583D00, #005811

Tints, shades & saturation

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

Lighter +40%#2568FF

Lighter +30%#004AF1

Lighter +20%#003ABE

Lighter +10%#002B8B

Darker −10%#000B25

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#001B58

Less saturated −25%#0B1F4D

Channel breakdown

G27

B88

Red0 (0%)

Green27 (10.6%)

Blue88 (34.5%)

Hue221.59°

Saturation (HSL)100%

Lightness17.25%

Dominant channelBlue

Hex per channelR 00 · G 1B · B 58

Keep nerding

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#001B58

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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