#183A7A#183A7A

#183A7A is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.3% C 0.116 H 261.6°. Best body text is #FFFFFF at 10.91:1 contrast (WCAG AA passes).

Color values

HEX	#183A7A
RGB	rgb(24, 58, 122)
HSL	hsl(219, 67%, 29%)
HSV	hsv(219, 80%, 48%)
CMYK	cmyk(80.3%, 52.5%, 0%, 52.2%)
CIE-LAB	lab(25.64, 12.76, -40.01)
CIE-LCH	lch(25.64, 41.99, 287.69°)
OKLab	oklab(36.32% -0.0171 -0.1151)
OKLCH	oklch(36.32% 0.116 261.6)
XYZ	xyz(5.4013, 4.6248, 19.0166)
Luminance	0.0462 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A7A #7A5818

analogous

#186B7A #183A7A #27187A

triadic

#183A7A #7A183A #3A7A18

tetradic

#183A7A #7A186B #7A5818 #187A27

square

#183A7A #7A186B #7A5818 #187A27

split-complementary

#183A7A #7A2718 #6B7A18

monochromatic

#050C1A #0E2247 #183A7A #2252AD #356DD7

Accessibility & contrast

On white

10.91

#183A7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#183A7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A7A

10.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A7A	#FFFFFF	#000000	##FFFFFF
##183A7A	1.00	10.91	1.93	10.91
#FFFFFF	10.91	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12417C

Deuteranopia (green-blind)

#003979

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183a7a;
/* rgb */ color: rgb(24, 58, 122);
/* oklch */ color: oklch(36.3% 0.116 261.6);

Tailwind

colors: {
  custom: {
    50: '#656fa1',
    500: '#183a7a',
    950: '#000000',
  },
}

SCSS

$custom: #183a7a;
$custom-light: #656fa1;
$custom-dark: #000000;

JSON

{
  "hex": "#183a7a",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 122
  },
  "hsl": {
    "h": 219.184,
    "s": 67.123,
    "l": 28.627
  },
  "oklch": {
    "l": 0.36323,
    "c": 0.11636,
    "h": 261.6
  },
  "luminance": 0.04625
}

Semantic roles & 50–950 ramp

primary

#183A7A

secondary

#AF883F

accent

#AE3EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #183A7A

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

Preview Lab → · Contrast checker → · Palette generator →