Colour

#21030A

#21030A
Red
Dark
Nearest: Black

#21030A is a red with RGB values 33, 3, 10 and HSL 346°, 83%, 7%. It is a dark colour, so white text on it reaches 19.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#21030A#21030A

HEX#21030A

RGBrgb(33, 3, 10)

RGB (0–1)0.1294, 0.0118, 0.0392

RGB percentages12.9%, 1.2%, 3.9%

HSLhsl(346, 83.3%, 7.1%)

HSV / HSBhsv(346, 90.9%, 12.9%)

CMYK0%, 90.9%, 69.7%, 87.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,163,466

CSS custom property--colour: #21030A;

Brightness & contrast

Relative luminance0.0041WCAG 2.x, 0 is black and 1 is white

Perceived brightness18.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 19.41:1

Contrast with white19.41:1WCAG normal text: AAA

Contrast with black1.08:1WCAG normal text: Fail

Greyscale equivalent#0A0A0A

Inverted#DEFCF5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#09090Ano red cones; affects about 1% of men; ΔE 13.4 from the original

Deuteranopia#111009no green cones; the most common form, about 1% of men; ΔE 14.2 from the original

Tritanopia#250005no blue cones; rare, and affects men and women equally; ΔE 3.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text19.41:1WCAG large text: AAA

Contrast with black, large text1.08:1WCAG large text: Fail

Named colours

Black · ΔE 13.9 Dark slate grey · ΔE 37.6 Dim grey · ΔE 42.9 Gray · ΔE 51.6 Slate grey · ΔE 52.9 Dark slateblue · ΔE 53.1

Nearest named CSS colourBlack (#000000)ΔE 13.9, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#03211A

Analogous#210319, #210B03

Triadic#0A2103, #030A21

Split complementary#03210B, #031921

Tetradic#192103, #03211A, #0B0321

Tints, shades & saturation

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

Lighter +40%#DC1443

Lighter +30%#AD1034

Lighter +20%#7F0B26

Lighter +10%#500718

Darker −10%#000000

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#240008

Less saturated −25%#1D070C

Channel breakdown

R33

B10

Red33 (12.9%)

Green3 (1.2%)

Blue10 (3.9%)

Hue346°

Saturation (HSL)83.33%

Lightness7.06%

Dominant channelRed

Hex per channelR 21 · G 03 · B 0A

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#21030A

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

Nerdulate something else