Nerdulator> put something in

Recognised as Colour

#18403D

  • #18403D
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#18403D is a cyan with RGB values 24, 64, 61 and HSL 176°, 45%, 17%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#18403D#18403D
HEX#18403D
RGBrgb(24, 64, 61)
RGB (0–1)0.0941, 0.251, 0.2392
RGB percentages9.4%, 25.1%, 23.9%
HSLhsl(175.5, 45.5%, 17.3%)
HSV / HSBhsv(175.5, 62.5%, 25.1%)
CMYK62.5%, 0%, 4.7%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,589,309
CSS custom property--colour: #18403D;

Brightness & contrast

Relative luminance0.04198WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.42:1
Contrast with white11.42:1WCAG normal text: AAA
Contrast with black1.84:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#E7BFC2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3C3D3Dno red cones; affects about 1% of men; ΔE 14.7 from the original
Deuteranopia#36383Dno green cones; the most common form, about 1% of men; ΔE 15.3 from the original
Tritanopia#00423Fno blue cones; rare, and affects men and women equally; ΔE 4.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.42:1WCAG large text: AAA
Contrast with black, large text1.84:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 7.7Dim grey · ΔE 25.1Teal · ΔE 28.4Black · ΔE 28.6Slate grey · ΔE 32.3Dark cyan · ΔE 32.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 7.72, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#40181B
Analogous#184029, #182F40
Triadic#3D1840, #403D18
Split complementary#40182F, #402918
Tetradic#291840, #40181B, #2F4018

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#60C4BC
Lighter +30%#42AFA7
Lighter +20%#348A84
Lighter +10%#266560
Darker −10%#0A1B1A
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0D4B46
Less saturated −25%#233534

Channel breakdown

R24
G64
B61
Red24 (9.4%)
Green64 (25.1%)
Blue61 (23.9%)
Hue175.5°
Saturation (HSL)45.45%
Lightness17.25%
Dominant channelGreen
Hex per channelR 18 · G 40 · B 3D

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 “18403d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.