Colour

#821D01

#821D01
Red
Dark
Nearest: Maroon

#821D01 is a red with RGB values 130, 29, 1 and HSL 13°, 98%, 26%. It is a dark colour, so white text on it reaches 9.9:1 contrast (AAA for normal text). The nearest named colour is Maroon.

Colour values

#821D01#821D01

HEX#821D01

RGBrgb(130, 29, 1)

RGB (0–1)0.5098, 0.1137, 0.0039

RGB percentages51%, 11.4%, 0.4%

HSLhsl(13, 98.5%, 25.7%)

HSV / HSBhsv(13, 99.2%, 51%)

CMYK0%, 77.7%, 99.2%, 49%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer8,527,105

CSS custom property--colour: #821D01;

Brightness & contrast

Relative luminance0.05627WCAG 2.x, 0 is black and 1 is white

Perceived brightness74.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 9.88:1

Contrast with white9.88:1WCAG normal text: AAA

Contrast with black2.13:1WCAG normal text: Fail

Greyscale equivalent#303030

Inverted#7DE2FE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#3D3500no red cones; affects about 1% of men; ΔE 45.9 from the original

Deuteranopia#564B00no green cones; the most common form, about 1% of men; ΔE 45 from the original

Tritanopia#900019no blue cones; rare, and affects men and women equally; ΔE 14.8 from the original

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

Contrast with white, large text9.88:1WCAG large text: AAA

Contrast with black, large text2.13:1WCAG large text: Fail

Named colours

Maroon · ΔE 7.4 Dark red · ΔE 9.4 Brown · ΔE 15.6 Saddle brown · ΔE 17.7 Firebrick · ΔE 18 Sienna · ΔE 20.3

Nearest named CSS colourMaroon (#800000)ΔE 7.4, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#016682

Analogous#820126, #825D01

Triadic#01821D, #1D0182

Split complementary#01825D, #012682

Tetradic#268201, #016682, #5D0182

Tints, shades & saturation

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

Lighter +40%#FE7751

Lighter +30%#FD4F1F

Lighter +20%#E73402

Lighter +10%#B52801

Darker −10%#4F1201

Darker −20%#1D0600

Darker −30%#000000

Darker −40%#000000

More saturated +25%#831C00

Less saturated −25%#722611

Channel breakdown

R130

G29

Red130 (51%)

Green29 (11.4%)

Blue1 (0.4%)

Hue13.02°

Saturation (HSL)98.47%

Lightness25.69%

Dominant channelRed

Hex per channelR 82 · G 1D · B 01

Keep nerding

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#821D01

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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