#183B6B#183B6B

#183B6B is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.4% C 0.093 H 257.1°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#183B6B
RGB	rgb(24, 59, 107)
HSL	hsl(215, 63%, 26%)
HSV	hsv(215, 78%, 42%)
CMYK	cmyk(77.6%, 44.9%, 0%, 58%)
CIE-LAB	lab(24.90, 5.83, -31.64)
CIE-LCH	lch(24.90, 32.18, 280.45°)
OKLab	oklab(35.42% -0.0207 -0.0905)
OKLCH	oklch(35.42% 0.093 257.1)
XYZ	xyz(4.5935, 4.3831, 14.5110)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B6B #6B4818

analogous

#18646B #183B6B #1E186B

triadic

#183B6B #6B183B #3B6B18

tetradic

#183B6B #6B1864 #6B4818 #186B1E

square

#183B6B #6B1864 #6B4818 #186B1E

split-complementary

#183B6B #6B1E18 #646B18

monochromatic

#060E19 #0D1F39 #183B6B #23579D #2E72CF

Accessibility & contrast

On white

11.19

#183B6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#183B6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B6B

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B6B	#FFFFFF	#000000	##FFFFFF
##183B6B	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#243F6D

Deuteranopia (green-blind)

#15386A

Tritanopia (blue-blind)

#00464D

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183b6b;
/* rgb */ color: rgb(24, 59, 107);
/* oklch */ color: oklch(35.4% 0.093 257.1);

Tailwind

colors: {
  custom: {
    50: '#617096',
    500: '#183b6b',
    950: '#000000',
  },
}

SCSS

$custom: #183b6b;
$custom-light: #617096;
$custom-dark: #000000;

JSON

{
  "hex": "#183b6b",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 107
  },
  "hsl": {
    "h": 214.699,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.35418,
    "c": 0.09282,
    "h": 257.1
  },
  "luminance": 0.04384
}

Semantic roles & 50–950 ramp

primary

#183B6B

secondary

#A1773E

accent

#A141E6

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #183B6B

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

Preview Lab → · Contrast checker → · Palette generator →