#18405B#18405B

#18405B is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.7% C 0.065 H 241.4°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#18405B
RGB	rgb(24, 64, 91)
HSL	hsl(204, 58%, 23%)
HSV	hsv(204, 74%, 36%)
CMYK	cmyk(73.6%, 29.7%, 0%, 64.3%)
CIE-LAB	lab(25.61, -4.04, -20.18)
CIE-LCH	lch(25.61, 20.58, 258.69°)
OKLab	oklab(35.67% -0.031 -0.0569)
OKLCH	oklch(35.67% 0.065 241.4)
XYZ	xyz(4.0977, 4.6159, 10.5705)
Luminance	0.0462 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18405B #5B3318

analogous

#185B54 #18405B #181F5B

triadic

#18405B #5B1840 #405B18

tetradic

#18405B #54185B #5B3318 #1F5B18

square

#18405B #54185B #5B3318 #1F5B18

split-complementary

#18405B #5B181F #5B5418

monochromatic

#061118 #0B1E2B #18405B #25628B #3284BC

Accessibility & contrast

On white

10.92

#18405B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#18405B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18405B

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18405B	#FFFFFF	#000000	##FFFFFF
##18405B	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#34405C

Deuteranopia (green-blind)

#2A3A5B

Tritanopia (blue-blind)

#004749

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #18405b;
/* rgb */ color: rgb(24, 64, 91);
/* oklch */ color: oklch(35.7% 0.065 241.4);

Tailwind

colors: {
  custom: {
    50: '#5e7489',
    500: '#18405b',
    950: '#000000',
  },
}

SCSS

$custom: #18405b;
$custom-light: #5e7489;
$custom-dark: #000000;

JSON

{
  "hex": "#18405b",
  "rgb": {
    "r": 24,
    "g": 64,
    "b": 91
  },
  "hsl": {
    "h": 204.179,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.3567,
    "c": 0.06478,
    "h": 241.4
  },
  "luminance": 0.04616
}

Semantic roles & 50–950 ramp

primary

#18405B

secondary

#925F3D

accent

#8546E1

background

#F5F7F8

surface

#E9EDF0

border

#C5C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #18405B

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →