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Recognised as Colour

#280F0A

  • #280F0A
  • Red
  • Dark
  • Nearest: Black

#280F0A is a red with RGB values 40, 15, 10 and HSL 10°, 60%, 10%. It is a dark colour, so white text on it reaches 18.1:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#280F0A#280F0A
HEX#280F0A
RGBrgb(40, 15, 10)
RGB (0–1)0.1569, 0.0588, 0.0392
RGB percentages15.7%, 5.9%, 3.9%
HSLhsl(10, 60%, 9.8%)
HSV / HSBhsv(10, 75%, 15.7%)
CMYK0%, 62.5%, 75%, 84.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,625,290
CSS custom property--colour: #280F0A;

Brightness & contrast

Relative luminance0.00815WCAG 2.x, 0 is black and 1 is white
Perceived brightness24.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.06:1
Contrast with white18.06:1WCAG normal text: AAA
Contrast with black1.16:1WCAG normal text: Fail
Greyscale equivalent#141414
Inverted#D7F0F5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#151309no red cones; affects about 1% of men; ΔE 13.6 from the original
Deuteranopia#1B180Ano green cones; the most common form, about 1% of men; ΔE 13.7 from the original
Tritanopia#2D0B0Eno blue cones; rare, and affects men and women equally; ΔE 5.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.06:1WCAG large text: AAA
Contrast with black, large text1.16:1WCAG large text: Fail

Named colours

Black · ΔE 16.1Dark slate grey · ΔE 35.7Dim grey · ΔE 39.7Saddle brown · ΔE 47.4Gray · ΔE 48.4Sienna · ΔE 49.2
Nearest named CSS colourBlack (#000000)ΔE 16.13, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0A2328
Analogous#280A14, #281E0A
Triadic#0A280F, #0F0A28
Split complementary#0A281E, #0A1428
Tetradic#14280A, #0A2328, #1E0A28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CB4C33
Lighter +30%#A23D29
Lighter +20%#7A2E1E
Lighter +10%#511E14
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#2E0B04
Less saturated −25%#221310

Channel breakdown

R40
G15
B10
Red40 (15.7%)
Green15 (5.9%)
Blue10 (3.9%)
Hue10°
Saturation (HSL)60%
Lightness9.8%
Dominant channelRed
Hex per channelR 28 · G 0F · B 0A

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Every value on this page was computed from “280f0a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.