Recognised as Colour

#280B0A

#280B0A
Red
Dark
Nearest: Black

#280B0A is a red with RGB values 40, 11, 10 and HSL 2°, 60%, 10%. It is a dark colour, so white text on it reaches 18.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#280B0A#280B0A

HEX#280B0A

RGBrgb(40, 11, 10)

RGB (0–1)0.1569, 0.0431, 0.0392

RGB percentages15.7%, 4.3%, 3.9%

HSLhsl(2, 60%, 9.8%)

HSV / HSBhsv(2, 75%, 15.7%)

CMYK0%, 72.5%, 75%, 84.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,624,266

CSS custom property--colour: #280B0A;

Brightness & contrast

Relative luminance0.00712WCAG 2.x, 0 is black and 1 is white

Perceived brightness23.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 18.38:1

Contrast with white18.38:1WCAG normal text: AAA

Contrast with black1.14:1WCAG normal text: Fail

Greyscale equivalent#111111

Inverted#D7F4F5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#12100Ano red cones; affects about 1% of men; ΔE 15.2 from the original

Deuteranopia#191709no green cones; the most common form, about 1% of men; ΔE 16.5 from the original

Tritanopia#2D060Bno blue cones; rare, and affects men and women equally; ΔE 5.3 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text18.38:1WCAG large text: AAA

Contrast with black, large text1.14:1WCAG large text: Fail

Named colours

Black · ΔE 17 Dark slate grey · ΔE 37.4 Dim grey · ΔE 41.1 Saddle brown · ΔE 48.4 Gray · ΔE 49.7 Sienna · ΔE 50

Nearest named CSS colourBlack (#000000)ΔE 17.01, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0A2728

Analogous#280A18, #281A0A

Triadic#0A280B, #0B0A28

Split complementary#0A281A, #0A1828

Tetradic#18280A, #0A2728, #1A0A28

Tints, shades & saturation

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

Lighter +40%#CB3833

Lighter +30%#A22D29

Lighter +20%#7A211E

Lighter +10%#511614

Darker −10%#000000

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#2E0504

Less saturated −25%#221110

Channel breakdown

R40

G11

B10

Red40 (15.7%)

Green11 (4.3%)

Blue10 (3.9%)

Hue2°

Saturation (HSL)60%

Lightness9.8%

Dominant channelRed

Hex per channelR 28 · G 0B · B 0A

Keep nerding

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

#280B0A

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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