#273B8F#273B8F

#273B8F is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.0% C 0.141 H 268.8°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#273B8F
RGB	rgb(39, 59, 143)
HSL	hsl(228, 57%, 36%)
HSV	hsv(228, 73%, 56%)
CMYK	cmyk(72.7%, 58.7%, 0%, 43.9%)
CIE-LAB	lab(28.23, 22.46, -48.88)
CIE-LCH	lch(28.23, 53.79, 294.68°)
OKLab	oklab(38.98% -0.003 -0.1409)
OKLCH	oklch(38.98% 0.141 268.8)
XYZ	xyz(7.3569, 5.5417, 26.6632)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273B8F #8F7B27

analogous

#276F8F #273B8F #47278F

triadic

#273B8F #8F273B #3B8F27

tetradic

#273B8F #8F276F #8F7B27 #278F47

square

#273B8F #8F276F #8F7B27 #278F47

split-complementary

#273B8F #8F4727 #6F8F27

monochromatic

#0D132F #1A275F #273B8F #344FBF #5D74D3

Accessibility & contrast

On white

9.96

#273B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#273B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273B8F

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273B8F	#FFFFFF	#000000	##FFFFFF
##273B8F	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#003E8D

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #273b8f;
/* rgb */ color: rgb(39, 59, 143);
/* oklch */ color: oklch(39.0% 0.141 268.8);

Tailwind

colors: {
  custom: {
    50: '#7070b0',
    500: '#273b8f',
    950: '#000000',
  },
}

SCSS

$custom: #273b8f;
$custom-light: #7070b0;
$custom-dark: #000000;

JSON

{
  "hex": "#273b8f",
  "rgb": {
    "r": 39,
    "g": 59,
    "b": 143
  },
  "hsl": {
    "h": 228.462,
    "s": 57.143,
    "l": 35.686
  },
  "oklch": {
    "l": 0.38978,
    "c": 0.14091,
    "h": 268.8
  },
  "luminance": 0.05542
}

Semantic roles & 50–950 ramp

primary

#273B8F

secondary

#B8A65A

accent

#C347E0

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #273B8F

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

Preview Lab → · Contrast checker → · Palette generator →