#273A8F#273A8F

#273A8F is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.8% C 0.142 H 269.1°. Best body text is #FFFFFF at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#273A8F
RGB	rgb(39, 58, 143)
HSL	hsl(229, 57%, 36%)
HSV	hsv(229, 73%, 56%)
CMYK	cmyk(72.7%, 59.4%, 0%, 43.9%)
CIE-LAB	lab(27.95, 23.14, -49.32)
CIE-LCH	lch(27.95, 54.48, 295.14°)
OKLab	oklab(38.78% -0.0022 -0.1422)
OKLCH	oklch(38.78% 0.142 269.1)
XYZ	xyz(7.3060, 5.4399, 26.6462)
Luminance	0.0544 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273A8F #8F7C27

analogous

#276E8F #273A8F #48278F

triadic

#273A8F #8F273A #3A8F27

tetradic

#273A8F #8F276E #8F7C27 #278F48

square

#273A8F #8F276E #8F7C27 #278F48

split-complementary

#273A8F #8F4827 #6E8F27

monochromatic

#0D132F #1A265F #273A8F #344EBF #5D73D3

Accessibility & contrast

On white

10.06

#273A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#273A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273A8F

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273A8F	#FFFFFF	#000000	##FFFFFF
##273A8F	1.00	10.06	2.09	10.06
#FFFFFF	10.06	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004792

Deuteranopia (green-blind)

#003D8D

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #273a8f;
/* rgb */ color: rgb(39, 58, 143);
/* oklch */ color: oklch(38.8% 0.142 269.1);

Tailwind

colors: {
  custom: {
    50: '#706fb0',
    500: '#273a8f',
    950: '#000000',
  },
}

SCSS

$custom: #273a8f;
$custom-light: #706fb0;
$custom-dark: #000000;

JSON

{
  "hex": "#273a8f",
  "rgb": {
    "r": 39,
    "g": 58,
    "b": 143
  },
  "hsl": {
    "h": 229.038,
    "s": 57.143,
    "l": 35.686
  },
  "oklch": {
    "l": 0.38775,
    "c": 0.14222,
    "h": 269.1
  },
  "luminance": 0.05441
}

Semantic roles & 50–950 ramp

primary

#273A8F

secondary

#B8A75A

accent

#C447E0

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #273A8F

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

Preview Lab → · Contrast checker → · Palette generator →