#273D8B#273D8B

#273D8B is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.133 H 267.9°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#273D8B
RGB	rgb(39, 61, 139)
HSL	hsl(227, 56%, 35%)
HSV	hsv(227, 72%, 55%)
CMYK	cmyk(71.9%, 56.1%, 0%, 45.5%)
CIE-LAB	lab(28.46, 19.55, -46.02)
CIE-LCH	lch(28.46, 50.00, 293.02°)
OKLab	oklab(39.06% -0.0049 -0.1325)
OKLCH	oklch(39.06% 0.133 267.9)
XYZ	xyz(7.1640, 5.6322, 25.1307)
Luminance	0.0563 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273D8B #8B7527

analogous

#276F8B #273D8B #43278B

triadic

#273D8B #8B273D #3D8B27

tetradic

#273D8B #8B276F #8B7527 #278B43

square

#273D8B #8B276F #8B7527 #278B43

split-complementary

#273D8B #8B4327 #6F8B27

monochromatic

#0C132B #1A285B #273D8B #3452BB #5B75D1

Accessibility & contrast

On white

9.87

#273D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#273D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273D8B

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273D8B	#FFFFFF	#000000	##FFFFFF
##273D8B	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488E

Deuteranopia (green-blind)

#003F89

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #273d8b;
/* rgb */ color: rgb(39, 61, 139);
/* oklch */ color: oklch(39.1% 0.133 267.9);

Tailwind

colors: {
  custom: {
    50: '#6f72ad',
    500: '#273d8b',
    950: '#000000',
  },
}

SCSS

$custom: #273d8b;
$custom-light: #6f72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#273d8b",
  "rgb": {
    "r": 39,
    "g": 61,
    "b": 139
  },
  "hsl": {
    "h": 226.8,
    "s": 56.18,
    "l": 34.902
  },
  "oklch": {
    "l": 0.39059,
    "c": 0.13254,
    "h": 267.9
  },
  "luminance": 0.05633
}

Semantic roles & 50–950 ramp

primary

#273D8B

secondary

#B6A158

accent

#BE48DF

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #273D8B

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

Preview Lab → · Contrast checker → · Palette generator →