Colour

#1B0040

#1B0040
Violet
Dark
Nearest: Midnight blue

#1B0040 is a violet with RGB values 27, 0, 64 and HSL 265°, 100%, 13%. It is a dark colour, so white text on it reaches 18.7:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#1B0040#1B0040

HEX#1B0040

RGBrgb(27, 0, 64)

RGB (0–1)0.1059, 0, 0.251

RGB percentages10.6%, 0%, 25.1%

HSLhsl(265.3, 100%, 12.5%)

HSV / HSBhsv(265.3, 100%, 25.1%)

CMYK57.8%, 100%, 0%, 74.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,769,536

CSS custom property--colour: #1B0040;

Brightness & contrast

Relative luminance0.00603WCAG 2.x, 0 is black and 1 is white

Perceived brightness26.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 18.74:1

Contrast with white18.74:1WCAG normal text: AAA

Contrast with black1.12:1WCAG normal text: Fail

Greyscale equivalent#0A0A0A

Inverted#E4FFBF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#001342no red cones; affects about 1% of men; ΔE 15.3 from the original

Deuteranopia#00113Fno green cones; the most common form, about 1% of men; ΔE 15.3 from the original

Tritanopia#0F1322no blue cones; rare, and affects men and women equally; ΔE 35.4 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text18.74:1WCAG large text: AAA

Contrast with black, large text1.12:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 18.8 Dark slateblue · ΔE 26.8 Indigo · ΔE 33 Rebecca purple · ΔE 33.2 Navy · ΔE 36.3 Purple · ΔE 38.3

Nearest named CSS colourMidnight blue (#191970)ΔE 18.76, a distinctly different colour

Hue familyviolet

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#254000

Analogous#000540, #3B0040

Triadic#401B00, #00401B

Split complementary#403B00, #054000

Tetradic#400005, #254000, #00403B

Tints, shades & saturation

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

Lighter +40%#730DFF

Lighter +30%#5C00D9

Lighter +20%#4600A6

Lighter +10%#310073

Darker −10%#05000D

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#1B0040

Less saturated −25%#1C0838

Channel breakdown

R27

B64

Red27 (10.6%)

Green0 (0%)

Blue64 (25.1%)

Hue265.31°

Saturation (HSL)100%

Lightness12.55%

Dominant channelBlue

Hex per channelR 1B · G 00 · B 40

Keep nerding

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#1B0040

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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