Nerdulator> put something in

Recognised as Colour

#180B0A

  • #180B0A
  • Red
  • Dark
  • Nearest: Black

#180B0A is a red with RGB values 24, 11, 10 and HSL 4°, 41%, 7%. It is a dark colour, so white text on it reaches 19.2:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#180B0A#180B0A
HEX#180B0A
RGBrgb(24, 11, 10)
RGB (0–1)0.0941, 0.0431, 0.0392
RGB percentages9.4%, 4.3%, 3.9%
HSLhsl(4.3, 41.2%, 6.7%)
HSV / HSBhsv(4.3, 58.3%, 9.4%)
CMYK0%, 54.2%, 58.3%, 90.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,575,690
CSS custom property--colour: #180B0A;

Brightness & contrast

Relative luminance0.00455WCAG 2.x, 0 is black and 1 is white
Perceived brightness16 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.25:1
Contrast with white19.25:1WCAG normal text: AAA
Contrast with black1.09:1WCAG normal text: Fail
Greyscale equivalent#0E0E0E
Inverted#E7F4F5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0E0D0Ano red cones; affects about 1% of men; ΔE 5.1 from the original
Deuteranopia#110F0Ano green cones; the most common form, about 1% of men; ΔE 4.9 from the original
Tritanopia#1B090Bno blue cones; rare, and affects men and women equally; ΔE 2.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.25:1WCAG large text: AAA
Contrast with black, large text1.09:1WCAG large text: Fail

Named colours

Black · ΔE 6.7Dark slate grey · ΔE 32.3Dim grey · ΔE 40.6Gray · ΔE 49.8Slate grey · ΔE 50.8Dark olivegreen · ΔE 53.1
Nearest named CSS colourBlack (#000000)ΔE 6.71, clearly different but related
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0A1718
Analogous#180A10, #18120A
Triadic#0A180B, #0B0A18
Split complementary#0A1812, #0A1018
Tetradic#10180A, #0A1718, #120A18

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A84D46
Lighter +30%#843C37
Lighter +20%#602C28
Lighter +10%#3C1B19
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1C0706
Less saturated −25%#140F0E

Channel breakdown

R24
G11
B10
Red24 (9.4%)
Green11 (4.3%)
Blue10 (3.9%)
Hue4.29°
Saturation (HSL)41.18%
Lightness6.67%
Dominant channelRed
Hex per channelR 18 · G 0B · B 0A

Keep nerding

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

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “180b0a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.