#183B7D#183B7D

#183B7D is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.8% C 0.119 H 261.6°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#183B7D
RGB	rgb(24, 59, 125)
HSL	hsl(219, 68%, 29%)
HSV	hsv(219, 81%, 49%)
CMYK	cmyk(80.8%, 52.8%, 0%, 51%)
CIE-LAB	lab(26.16, 13.29, -41.05)
CIE-LCH	lch(26.16, 43.15, 287.95°)
OKLab	oklab(36.8% -0.0175 -0.1181)
OKLCH	oklch(36.8% 0.119 261.6)
XYZ	xyz(5.6410, 4.8021, 20.0277)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B7D #7D5A18

analogous

#186E7D #183B7D #28187D

triadic

#183B7D #7D183B #3B7D18

tetradic

#183B7D #7D186E #7D5A18 #187D28

square

#183B7D #7D186E #7D5A18 #187D28

split-complementary

#183B7D #7D2818 #6E7D18

monochromatic

#050C1A #0E234A #183B7D #2253B0 #376FD9

Accessibility & contrast

On white

10.71

#183B7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#183B7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B7D

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B7D	#FFFFFF	#000000	##FFFFFF
##183B7D	1.00	10.71	1.96	10.71
#FFFFFF	10.71	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#11437F

Deuteranopia (green-blind)

#003A7C

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183b7d;
/* rgb */ color: rgb(24, 59, 125);
/* oklch */ color: oklch(36.8% 0.119 261.6);

Tailwind

colors: {
  custom: {
    50: '#6670a3',
    500: '#183b7d',
    950: '#000000',
  },
}

SCSS

$custom: #183b7d;
$custom-light: #6670a3;
$custom-dark: #000000;

JSON

{
  "hex": "#183b7d",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 125
  },
  "hsl": {
    "h": 219.208,
    "s": 67.785,
    "l": 29.216
  },
  "oklch": {
    "l": 0.36796,
    "c": 0.11944,
    "h": 261.6
  },
  "luminance": 0.04803
}

Semantic roles & 50–950 ramp

primary

#183B7D

secondary

#B28A3F

accent

#AF3DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183B7D

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

Preview Lab → · Contrast checker → · Palette generator →