Colour

#1B0501

#1B0501
Red
Dark
Nearest: Black

#1B0501 is a red with RGB values 27, 5, 1 and HSL 9°, 93%, 5%. It is a dark colour, so white text on it reaches 19.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1B0501#1B0501

HEX#1B0501

RGBrgb(27, 5, 1)

RGB (0–1)0.1059, 0.0196, 0.0039

RGB percentages10.6%, 2%, 0.4%

HSLhsl(9.2, 92.9%, 5.5%)

HSV / HSBhsv(9.2, 96.3%, 10.6%)

CMYK0%, 81.5%, 96.3%, 89.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,770,753

CSS custom property--colour: #1B0501;

Brightness & contrast

Relative luminance0.00344WCAG 2.x, 0 is black and 1 is white

Perceived brightness15.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 19.65:1

Contrast with white19.65:1WCAG normal text: AAA

Contrast with black1.07:1WCAG normal text: Fail

Greyscale equivalent#090909

Inverted#E4FAFE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0B0801no red cones; affects about 1% of men; ΔE 7.9 from the original

Deuteranopia#100D01no green cones; the most common form, about 1% of men; ΔE 8.3 from the original

Tritanopia#1F0204no blue cones; rare, and affects men and women equally; ΔE 4.1 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text19.65:1WCAG large text: AAA

Contrast with black, large text1.07:1WCAG large text: Fail

Named colours

Black · ΔE 9.3 Dark slate grey · ΔE 35.1 Dim grey · ΔE 42.2 Gray · ΔE 51.2 Slate grey · ΔE 52.8 Saddle brown · ΔE 53.6

Nearest named CSS colourBlack (#000000)ΔE 9.29, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#01171B

Analogous#1B010A, #1B1201

Triadic#011B05, #05011B

Split complementary#011B12, #010A1B

Tetradic#0A1B01, #01171B, #12011B

Tints, shades & saturation

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

Lighter +40%#E02908

Lighter +30%#AF2006

Lighter +20%#7D1705

Lighter +10%#4C0E03

Darker −10%#000000

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#1C0400

Less saturated −25%#170705

Channel breakdown

R27

Red27 (10.6%)

Green5 (2%)

Blue1 (0.4%)

Hue9.23°

Saturation (HSL)92.86%

Lightness5.49%

Dominant channelRed

Hex per channelR 1B · G 05 · B 01

Keep nerding

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#1B0501

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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