#18283B#18283B

#18283B is a dark, muted cyan. Relative luminance 0.020; OKLCH L 27.2% C 0.042 H 253.4°. Best body text is #FFFFFF at 14.94:1 contrast (WCAG AA passes).

Color values

HEX	#18283B
RGB	rgb(24, 40, 59)
HSL	hsl(213, 42%, 16%)
HSV	hsv(213, 59%, 23%)
CMYK	cmyk(59.3%, 32.2%, 0%, 76.9%)
CIE-LAB	lab(15.63, -0.06, -14.24)
CIE-LCH	lch(15.63, 14.24, 269.77°)
OKLab	oklab(27.24% -0.0119 -0.0399)
OKLCH	oklch(27.24% 0.042 253.4)
XYZ	xyz(1.9246, 2.0274, 4.4267)
Luminance	0.0203 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18283B #3B2B18

analogous

#183A3B #18283B #1A183B

triadic

#18283B #3B1828 #283B18

tetradic

#18283B #3B183A #3B2B18 #183B1A

square

#18283B #3B183A #3B2B18 #183B1A

split-complementary

#18283B #3B1A18 #3A3B18

monochromatic

#090F16 #090F16 #18283B #2A4567 #3B6392

Accessibility & contrast

On white

14.94

#18283B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#18283B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18283B

14.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18283B	#FFFFFF	#000000	##FFFFFF
##18283B	1.00	14.94	1.41	14.94
#FFFFFF	14.94	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20293C

Deuteranopia (green-blind)

#1C253B

Tritanopia (blue-blind)

#072C2F

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #18283b;
/* rgb */ color: rgb(24, 40, 59);
/* oklch */ color: oklch(27.2% 0.042 253.4);

Tailwind

colors: {
  custom: {
    50: '#586171',
    500: '#18283b',
    950: '#000000',
  },
}

SCSS

$custom: #18283b;
$custom-light: #586171;
$custom-dark: #000000;

JSON

{
  "hex": "#18283b",
  "rgb": {
    "r": 24,
    "g": 40,
    "b": 59
  },
  "hsl": {
    "h": 212.571,
    "s": 42.169,
    "l": 16.275
  },
  "oklch": {
    "l": 0.27242,
    "c": 0.04164,
    "h": 253.4
  },
  "luminance": 0.02028
}

Semantic roles & 50–950 ramp

primary

#18283B

secondary

#715A3E

accent

#9956D2

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030507

muted

#78797A

Preview Lab

Preview with #18283B

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

Preview Lab → · Contrast checker → · Palette generator →