#183C7A#183C7A

#183C7A is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.8% C 0.114 H 260.5°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#183C7A
RGB	rgb(24, 60, 122)
HSL	hsl(218, 67%, 29%)
HSV	hsv(218, 80%, 48%)
CMYK	cmyk(80.3%, 50.8%, 0%, 52.2%)
CIE-LAB	lab(26.25, 11.35, -39.02)
CIE-LCH	lch(26.25, 40.64, 286.21°)
OKLab	oklab(36.79% -0.0188 -0.1122)
OKLCH	oklch(36.79% 0.114 260.5)
XYZ	xyz(5.5041, 4.8304, 19.0509)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C7A #7A5618

analogous

#186D7A #183C7A #25187A

triadic

#183C7A #7A183C #3C7A18

tetradic

#183C7A #7A186D #7A5618 #187A25

square

#183C7A #7A186D #7A5618 #187A25

split-complementary

#183C7A #7A2518 #6D7A18

monochromatic

#050D1A #0E2347 #183C7A #2255AD #3571D7

Accessibility & contrast

On white

10.68

#183C7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#183C7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C7A

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C7A	#FFFFFF	#000000	##FFFFFF
##183C7A	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)

#18437C

Deuteranopia (green-blind)

#003A79

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183c7a;
/* rgb */ color: rgb(24, 60, 122);
/* oklch */ color: oklch(36.8% 0.114 260.5);

Tailwind

colors: {
  custom: {
    50: '#6571a1',
    500: '#183c7a',
    950: '#000000',
  },
}

SCSS

$custom: #183c7a;
$custom-light: #6571a1;
$custom-dark: #000000;

JSON

{
  "hex": "#183c7a",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 122
  },
  "hsl": {
    "h": 217.959,
    "s": 67.123,
    "l": 28.627
  },
  "oklch": {
    "l": 0.36788,
    "c": 0.11373,
    "h": 260.5
  },
  "luminance": 0.04831
}

Semantic roles & 50–950 ramp

primary

#183C7A

secondary

#AF863F

accent

#AB3EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #183C7A

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

Preview Lab → · Contrast checker → · Palette generator →