#183C7B#183C7B

#183C7B is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.9% C 0.115 H 260.7°. Best body text is #FFFFFF at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#183C7B
RGB	rgb(24, 60, 123)
HSL	hsl(218, 67%, 29%)
HSV	hsv(218, 80%, 48%)
CMYK	cmyk(80.5%, 51.2%, 0%, 51.8%)
CIE-LAB	lab(26.32, 11.76, -39.54)
CIE-LCH	lch(26.32, 41.25, 286.57°)
OKLab	oklab(36.87% -0.0186 -0.1137)
OKLCH	oklch(36.87% 0.115 260.7)
XYZ	xyz(5.5664, 4.8553, 19.3789)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C7B #7B5718

analogous

#186E7B #183C7B #26187B

triadic

#183C7B #7B183C #3C7B18

tetradic

#183C7B #7B186E #7B5718 #187B26

square

#183C7B #7B186E #7B5718 #187B26

split-complementary

#183C7B #7B2618 #6E7B18

monochromatic

#050C1A #0E2348 #183C7B #2255AE #3671D8

Accessibility & contrast

On white

10.65

#183C7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#183C7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C7B

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C7B	#FFFFFF	#000000	##FFFFFF
##183C7B	1.00	10.65	1.97	10.65
#FFFFFF	10.65	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17437D

Deuteranopia (green-blind)

#003A7A

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183c7b;
/* rgb */ color: rgb(24, 60, 123);
/* oklch */ color: oklch(36.9% 0.115 260.7);

Tailwind

colors: {
  custom: {
    50: '#6571a2',
    500: '#183c7b',
    950: '#000000',
  },
}

SCSS

$custom: #183c7b;
$custom-light: #6571a2;
$custom-dark: #000000;

JSON

{
  "hex": "#183c7b",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 123
  },
  "hsl": {
    "h": 218.182,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.36867,
    "c": 0.11519,
    "h": 260.7
  },
  "luminance": 0.04856
}

Semantic roles & 50–950 ramp

primary

#183C7B

secondary

#B0873F

accent

#AB3EEA

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #183C7B

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

Preview Lab → · Contrast checker → · Palette generator →