#183F6D#183F6D

#183F6D is a dark, moderate cyan. Relative luminance 0.049; OKLCH L 36.6% C 0.091 H 254.5°. Best body text is #FFFFFF at 10.66:1 contrast (WCAG AA passes).

Color values

HEX	#183F6D
RGB	rgb(24, 63, 109)
HSL	hsl(212, 64%, 26%)
HSV	hsv(212, 78%, 43%)
CMYK	cmyk(78%, 42.2%, 0%, 57.3%)
CIE-LAB	lab(26.31, 3.88, -30.67)
CIE-LCH	lch(26.31, 30.92, 277.22°)
OKLab	oklab(36.56% -0.0243 -0.0875)
OKLCH	oklch(36.56% 0.091 254.5)
XYZ	xyz(4.9135, 4.8528, 15.1428)
Luminance	0.0485 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F6D #6D4618

analogous

#18696D #183F6D #1B186D

triadic

#183F6D #6D183F #3F6D18

tetradic

#183F6D #6D1869 #6D4618 #186D1B

square

#183F6D #6D1869 #6D4618 #186D1B

split-complementary

#183F6D #6D1B18 #696D18

monochromatic

#060E19 #0D223B #183F6D #235C9F #2E79D1

Accessibility & contrast

On white

10.66

#183F6D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#183F6D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F6D

10.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F6D	#FFFFFF	#000000	##FFFFFF
##183F6D	1.00	10.66	1.97	10.66
#FFFFFF	10.66	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29436F

Deuteranopia (green-blind)

#1B3B6C

Tritanopia (blue-blind)

#004A50

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183f6d;
/* rgb */ color: rgb(24, 63, 109);
/* oklch */ color: oklch(36.6% 0.091 254.5);

Tailwind

colors: {
  custom: {
    50: '#627397',
    500: '#183f6d',
    950: '#000000',
  },
}

SCSS

$custom: #183f6d;
$custom-light: #627397;
$custom-dark: #000000;

JSON

{
  "hex": "#183f6d",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 109
  },
  "hsl": {
    "h": 212.471,
    "s": 63.91,
    "l": 26.078
  },
  "oklch": {
    "l": 0.36556,
    "c": 0.09085,
    "h": 254.5
  },
  "luminance": 0.04853
}

Semantic roles & 50–950 ramp

primary

#183F6D

secondary

#A3753E

accent

#9B41E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080D

muted

#7A7B7E

Preview Lab

Preview with #183F6D

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

Preview Lab → · Contrast checker → · Palette generator →