#183A7E#183A7E

#183A7E is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.6% C 0.122 H 262.2°. Best body text is #FFFFFF at 10.79:1 contrast (WCAG AA passes).

Color values

HEX	#183A7E
RGB	rgb(24, 58, 126)
HSL	hsl(220, 68%, 29%)
HSV	hsv(220, 81%, 49%)
CMYK	cmyk(81%, 54%, 0%, 50.6%)
CIE-LAB	lab(25.94, 14.41, -42.04)
CIE-LCH	lch(25.94, 44.44, 288.93°)
OKLab	oklab(36.65% -0.0166 -0.1211)
OKLCH	oklch(36.65% 0.122 262.2)
XYZ	xyz(5.6543, 4.7260, 20.3488)
Luminance	0.0473 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A7E #7E5C18

analogous

#186D7E #183A7E #29187E

triadic

#183A7E #7E183A #3A7E18

tetradic

#183A7E #7E186D #7E5C18 #187E29

square

#183A7E #7E186D #7E5C18 #187E29

split-complementary

#183A7E #7E2918 #6D7E18

monochromatic

#050C1A #0E224B #183A7E #2252B1 #376DD9

Accessibility & contrast

On white

10.79

#183A7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#183A7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A7E

10.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A7E	#FFFFFF	#000000	##FFFFFF
##183A7E	1.00	10.79	1.95	10.79
#FFFFFF	10.79	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A4280

Deuteranopia (green-blind)

#00397D

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183a7e;
/* rgb */ color: rgb(24, 58, 126);
/* oklch */ color: oklch(36.6% 0.122 262.2);

Tailwind

colors: {
  custom: {
    50: '#666fa4',
    500: '#183a7e',
    950: '#000000',
  },
}

SCSS

$custom: #183a7e;
$custom-light: #666fa4;
$custom-dark: #000000;

JSON

{
  "hex": "#183a7e",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 126
  },
  "hsl": {
    "h": 220,
    "s": 68,
    "l": 29.412
  },
  "oklch": {
    "l": 0.36649,
    "c": 0.12221,
    "h": 262.2
  },
  "luminance": 0.04727
}

Semantic roles & 50–950 ramp

primary

#183A7E

secondary

#B28C3F

accent

#B13DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183A7E

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

Preview Lab → · Contrast checker → · Palette generator →