#183F65#183F65

#183F65 is a dark, moderate cyan. Relative luminance 0.047; OKLCH L 36.0% C 0.079 H 250.5°. Best body text is #FFFFFF at 10.84:1 contrast (WCAG AA passes).

Color values

HEX	#183F65
RGB	rgb(24, 63, 101)
HSL	hsl(210, 62%, 25%)
HSV	hsv(210, 76%, 40%)
CMYK	cmyk(76.2%, 37.6%, 0%, 60.4%)
CIE-LAB	lab(25.83, 0.62, -26.31)
CIE-LCH	lch(25.83, 26.31, 271.35°)
OKLab	oklab(36.02% -0.0265 -0.0748)
OKLCH	oklch(36.02% 0.079 250.5)
XYZ	xyz(4.5023, 4.6883, 12.9770)
Luminance	0.0469 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F65 #653E18

analogous

#186565 #183F65 #181965

triadic

#183F65 #65183F #3F6518

tetradic

#183F65 #651865 #653E18 #196518

square

#183F65 #651865 #653E18 #196518

split-complementary

#183F65 #651819 #656518

monochromatic

#060F19 #0C2034 #183F65 #245E96 #307DC8

Accessibility & contrast

On white

10.84

#183F65 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#183F65 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F65

10.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F65	#FFFFFF	#000000	##FFFFFF
##183F65	1.00	10.84	1.94	10.84
#FFFFFF	10.84	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4167

Deuteranopia (green-blind)

#233A64

Tritanopia (blue-blind)

#00484D

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183f65;
/* rgb */ color: rgb(24, 63, 101);
/* oklch */ color: oklch(36.0% 0.079 250.5);

Tailwind

colors: {
  custom: {
    50: '#607391',
    500: '#183f65',
    950: '#000000',
  },
}

SCSS

$custom: #183f65;
$custom-light: #607391;
$custom-dark: #000000;

JSON

{
  "hex": "#183f65",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 101
  },
  "hsl": {
    "h": 209.61,
    "s": 61.6,
    "l": 24.51
  },
  "oklch": {
    "l": 0.36021,
    "c": 0.07932,
    "h": 250.5
  },
  "luminance": 0.04689
}

Semantic roles & 50–950 ramp

primary

#183F65

secondary

#9B6C3E

accent

#9343E5

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#05080C

muted

#7A7B7D

Preview Lab

Preview with #183F65

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

Preview Lab → · Contrast checker → · Palette generator →