#18405A#18405A

#18405A is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.6% C 0.064 H 240.4°. Best body text is #FFFFFF at 10.94:1 contrast (WCAG AA passes).

Color values

HEX	#18405A
RGB	rgb(24, 64, 90)
HSL	hsl(204, 58%, 22%)
HSV	hsv(204, 73%, 35%)
CMYK	cmyk(73.3%, 28.9%, 0%, 64.7%)
CIE-LAB	lab(25.56, -4.43, -19.61)
CIE-LCH	lch(25.56, 20.10, 257.28°)
OKLab	oklab(35.61% -0.0313 -0.0552)
OKLCH	oklch(35.61% 0.064 240.4)
XYZ	xyz(4.0548, 4.5987, 10.3448)
Luminance	0.0460 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18405A #5A3218

analogous

#185A53 #18405A #181F5A

triadic

#18405A #5A1840 #405A18

tetradic

#18405A #53185A #5A3218 #1F5A18

square

#18405A #53185A #5A3218 #1F5A18

split-complementary

#18405A #5A181F #5A5318

monochromatic

#061118 #0B1E2A #18405A #25628A #3285BB

Accessibility & contrast

On white

10.94

#18405A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#18405A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18405A

10.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18405A	#FFFFFF	#000000	##FFFFFF
##18405A	1.00	10.94	1.92	10.94
#FFFFFF	10.94	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#34405B

Deuteranopia (green-blind)

#2B3A5A

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #18405a;
/* rgb */ color: rgb(24, 64, 90);
/* oklch */ color: oklch(35.6% 0.064 240.4);

Tailwind

colors: {
  custom: {
    50: '#5e7488',
    500: '#18405a',
    950: '#000000',
  },
}

SCSS

$custom: #18405a;
$custom-light: #5e7488;
$custom-dark: #000000;

JSON

{
  "hex": "#18405a",
  "rgb": {
    "r": 24,
    "g": 64,
    "b": 90
  },
  "hsl": {
    "h": 203.636,
    "s": 57.895,
    "l": 22.353
  },
  "oklch": {
    "l": 0.35612,
    "c": 0.06351,
    "h": 240.4
  },
  "luminance": 0.04599
}

Semantic roles & 50–950 ramp

primary

#18405A

secondary

#915E3D

accent

#8447E1

background

#F5F7F8

surface

#E9EDF0

border

#C5C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #18405A

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

Preview Lab → · Contrast checker → · Palette generator →