#183B7E#183B7E

#183B7E is a dark, vivid blue. Relative luminance 0.048; OKLCH L 36.9% C 0.121 H 261.7°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#183B7E
RGB	rgb(24, 59, 126)
HSL	hsl(219, 68%, 29%)
HSV	hsv(219, 81%, 49%)
CMYK	cmyk(81%, 53.2%, 0%, 50.6%)
CIE-LAB	lab(26.24, 13.71, -41.55)
CIE-LCH	lch(26.24, 43.76, 288.26°)
OKLab	oklab(36.88% -0.0174 -0.1196)
OKLCH	oklch(36.88% 0.121 261.7)
XYZ	xyz(5.7052, 4.8278, 20.3658)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B7E #7E5B18

analogous

#186E7E #183B7E #28187E

triadic

#183B7E #7E183B #3B7E18

tetradic

#183B7E #7E186E #7E5B18 #187E28

square

#183B7E #7E186E #7E5B18 #187E28

split-complementary

#183B7E #7E2818 #6E7E18

monochromatic

#050C1A #0E234B #183B7E #2253B1 #376FD9

Accessibility & contrast

On white

10.68

#183B7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#183B7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B7E

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B7E	#FFFFFF	#000000	##FFFFFF
##183B7E	1.00	10.68	1.97	10.68
#FFFFFF	10.68	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F4380

Deuteranopia (green-blind)

#003A7D

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183b7e;
/* rgb */ color: rgb(24, 59, 126);
/* oklch */ color: oklch(36.9% 0.121 261.7);

Tailwind

colors: {
  custom: {
    50: '#6670a4',
    500: '#183b7e',
    950: '#000000',
  },
}

SCSS

$custom: #183b7e;
$custom-light: #6670a4;
$custom-dark: #000000;

JSON

{
  "hex": "#183b7e",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 126
  },
  "hsl": {
    "h": 219.412,
    "s": 68,
    "l": 29.412
  },
  "oklch": {
    "l": 0.36877,
    "c": 0.12089,
    "h": 261.7
  },
  "luminance": 0.04828
}

Semantic roles & 50–950 ramp

primary

#183B7E

secondary

#B28B3F

accent

#AF3DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183B7E

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

Preview Lab → · Contrast checker → · Palette generator →