#183D6B#183D6B

#183D6B is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.9% C 0.090 H 255.4°. Best body text is #FFFFFF at 10.95:1 contrast (WCAG AA passes).

Color values

HEX	#183D6B
RGB	rgb(24, 61, 107)
HSL	hsl(213, 63%, 26%)
HSV	hsv(213, 78%, 42%)
CMYK	cmyk(77.6%, 43%, 0%, 58%)
CIE-LAB	lab(25.54, 4.44, -30.62)
CIE-LCH	lch(25.54, 30.94, 278.26°)
OKLab	oklab(35.92% -0.0227 -0.0874)
OKLCH	oklch(35.92% 0.09 255.4)
XYZ	xyz(4.6983, 4.5927, 14.5459)
Luminance	0.0459 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D6B #6B4618

analogous

#18666B #183D6B #1C186B

triadic

#183D6B #6B183D #3D6B18

tetradic

#183D6B #6B1866 #6B4618 #186B1C

square

#183D6B #6B1866 #6B4618 #186B1C

split-complementary

#183D6B #6B1C18 #666B18

monochromatic

#060E19 #0D2139 #183D6B #23599D #2E76CF

Accessibility & contrast

On white

10.95

#183D6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#183D6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D6B

10.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D6B	#FFFFFF	#000000	##FFFFFF
##183D6B	1.00	10.95	1.92	10.95
#FFFFFF	10.95	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#27416D

Deuteranopia (green-blind)

#19396A

Tritanopia (blue-blind)

#00484E

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183d6b;
/* rgb */ color: rgb(24, 61, 107);
/* oklch */ color: oklch(35.9% 0.090 255.4);

Tailwind

colors: {
  custom: {
    50: '#617296',
    500: '#183d6b',
    950: '#000000',
  },
}

SCSS

$custom: #183d6b;
$custom-light: #617296;
$custom-dark: #000000;

JSON

{
  "hex": "#183d6b",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 107
  },
  "hsl": {
    "h": 213.253,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.35916,
    "c": 0.09034,
    "h": 255.4
  },
  "luminance": 0.04593
}

Semantic roles & 50–950 ramp

primary

#183D6B

secondary

#A1753E

accent

#9D41E6

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #183D6B

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

Preview Lab → · Contrast checker → · Palette generator →