#183A6B#183A6B

#183A6B is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.2% C 0.094 H 257.9°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#183A6B
RGB	rgb(24, 58, 107)
HSL	hsl(215, 63%, 26%)
HSV	hsv(215, 78%, 42%)
CMYK	cmyk(77.6%, 45.8%, 0%, 58%)
CIE-LAB	lab(24.58, 6.54, -32.15)
CIE-LCH	lch(24.58, 32.81, 281.49°)
OKLab	oklab(35.17% -0.0197 -0.092)
OKLCH	oklch(35.17% 0.094 257.9)
XYZ	xyz(4.5426, 4.2813, 14.4940)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A6B #6B4918

analogous

#18636B #183A6B #1F186B

triadic

#183A6B #6B183A #3A6B18

tetradic

#183A6B #6B1863 #6B4918 #186B1F

square

#183A6B #6B1863 #6B4918 #186B1F

split-complementary

#183A6B #6B1F18 #636B18

monochromatic

#060E19 #0D1F39 #183A6B #23559D #2E70CF

Accessibility & contrast

On white

11.31

#183A6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#183A6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A6B

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A6B	#FFFFFF	#000000	##FFFFFF
##183A6B	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#223E6D

Deuteranopia (green-blind)

#12376A

Tritanopia (blue-blind)

#00454D

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183a6b;
/* rgb */ color: rgb(24, 58, 107);
/* oklch */ color: oklch(35.2% 0.094 257.9);

Tailwind

colors: {
  custom: {
    50: '#626f96',
    500: '#183a6b',
    950: '#000000',
  },
}

SCSS

$custom: #183a6b;
$custom-light: #626f96;
$custom-dark: #000000;

JSON

{
  "hex": "#183a6b",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 107
  },
  "hsl": {
    "h": 215.422,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.35171,
    "c": 0.09409,
    "h": 257.9
  },
  "luminance": 0.04282
}

Semantic roles & 50–950 ramp

primary

#183A6B

secondary

#A1783E

accent

#A341E6

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #183A6B

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

Preview Lab → · Contrast checker → · Palette generator →