Colour

#100A09

#100A09
Red
Dark
Nearest: Black

#100A09 is a red with RGB values 16, 10, 9 and HSL 9°, 28%, 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

#100A09#100A09

HEX#100A09

RGBrgb(16, 10, 9)

RGB (0–1)0.0627, 0.0392, 0.0353

RGB percentages6.3%, 3.9%, 3.5%

HSLhsl(8.6, 28%, 4.9%)

HSV / HSBhsv(8.6, 43.8%, 6.3%)

CMYK0%, 37.5%, 43.8%, 93.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,051,145

CSS custom property--colour: #100A09;

Brightness & contrast

Relative luminance0.00347WCAG 2.x, 0 is black and 1 is white

Perceived brightness12 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 19.64:1

Contrast with white19.64:1WCAG normal text: AAA

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

Greyscale equivalent#0B0B0B

Inverted#EFF5F6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0B0B09no red cones; affects about 1% of men; ΔE 2 from the original

Deuteranopia#0D0C09no green cones; the most common form, about 1% of men; ΔE 1.9 from the original

Tritanopia#11090Ano blue cones; rare, and affects men and women equally; ΔE 1.1 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text19.64:1WCAG large text: AAA

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

Named colours

Black · ΔE 3.7 Dark slate grey · ΔE 31.5 Dim grey · ΔE 41.3 Gray · ΔE 50.5 Slate grey · ΔE 51.2 Dark olivegreen · ΔE 53.1

Nearest named CSS colourBlack (#000000)ΔE 3.72, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#090F10

Analogous#10090C, #100E09

Triadic#09100A, #0A0910

Split complementary#09100E, #090C10

Tetradic#0C1009, #090F10, #0D0910

Tints, shades & saturation

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

Lighter +40%#935C52

Lighter +30%#724740

Lighter +20%#51332E

Lighter +10%#311E1B

Darker −10%#000000

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#130806

Less saturated −25%#0D0C0C

Channel breakdown

R16

G10

Red16 (6.3%)

Green10 (3.9%)

Blue9 (3.5%)

Hue8.57°

Saturation (HSL)28%

Lightness4.9%

Dominant channelRed

Hex per channelR 10 · G 0A · B 09

Keep nerding

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#100A09

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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