#273D8E#273D8E

#273D8E is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.3% C 0.137 H 268.0°. Best body text is #FFFFFF at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#273D8E
RGB	rgb(39, 61, 142)
HSL	hsl(227, 57%, 35%)
HSV	hsv(227, 73%, 56%)
CMYK	cmyk(72.5%, 57%, 0%, 44.3%)
CIE-LAB	lab(28.70, 20.71, -47.49)
CIE-LCH	lch(28.70, 51.81, 293.56°)
OKLab	oklab(39.31% -0.0048 -0.1368)
OKLCH	oklch(39.31% 0.137 268)
XYZ	xyz(7.3862, 5.7211, 26.3010)
Luminance	0.0572 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273D8E #8E7827

analogous

#27718E #273D8E #44278E

triadic

#273D8E #8E273D #3D8E27

tetradic

#273D8E #8E2771 #8E7827 #278E44

square

#273D8E #8E2771 #8E7827 #278E44

split-complementary

#273D8E #8E4427 #718E27

monochromatic

#0D142E #1A285E #273D8E #3452BE #5D76D2

Accessibility & contrast

On white

9.79

#273D8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#273D8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273D8E

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273D8E	#FFFFFF	#000000	##FFFFFF
##273D8E	1.00	9.79	2.14	9.79
#FFFFFF	9.79	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004991

Deuteranopia (green-blind)

#003F8C

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #273d8e;
/* rgb */ color: rgb(39, 61, 142);
/* oklch */ color: oklch(39.3% 0.137 268.0);

Tailwind

colors: {
  custom: {
    50: '#6f72b0',
    500: '#273d8e',
    950: '#000000',
  },
}

SCSS

$custom: #273d8e;
$custom-light: #6f72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#273d8e",
  "rgb": {
    "r": 39,
    "g": 61,
    "b": 142
  },
  "hsl": {
    "h": 227.184,
    "s": 56.906,
    "l": 35.49
  },
  "oklch": {
    "l": 0.39307,
    "c": 0.13687,
    "h": 268
  },
  "luminance": 0.05722
}

Semantic roles & 50–950 ramp

primary

#273D8E

secondary

#B8A359

accent

#C048E0

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #273D8E

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

Preview Lab → · Contrast checker → · Palette generator →