#273B8A#273B8A

#273B8A is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.134 H 268.6°. Best body text is #FFFFFF at 10.10:1 contrast (WCAG AA passes).

Color values

HEX	#273B8A
RGB	rgb(39, 59, 138)
HSL	hsl(228, 56%, 35%)
HSV	hsv(228, 72%, 54%)
CMYK	cmyk(71.7%, 57.2%, 0%, 45.9%)
CIE-LAB	lab(27.83, 20.54, -46.43)
CIE-LCH	lch(27.83, 50.77, 293.86°)
OKLab	oklab(38.56% -0.0032 -0.1337)
OKLCH	oklch(38.56% 0.134 268.6)
XYZ	xyz(6.9865, 5.3935, 24.7127)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273B8A #8A7627

analogous

#276C8A #273B8A #45278A

triadic

#273B8A #8A273B #3B8A27

tetradic

#273B8A #8A276C #8A7627 #278A45

square

#273B8A #8A276C #8A7627 #278A45

split-complementary

#273B8A #8A4527 #6C8A27

monochromatic

#0C122B #1A275A #273B8A #344FBA #5B73D1

Accessibility & contrast

On white

10.10

#273B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#273B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273B8A

10.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273B8A	#FFFFFF	#000000	##FFFFFF
##273B8A	1.00	10.10	2.08	10.10
#FFFFFF	10.10	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468D

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #273b8a;
/* rgb */ color: rgb(39, 59, 138);
/* oklch */ color: oklch(38.6% 0.134 268.6);

Tailwind

colors: {
  custom: {
    50: '#6f70ad',
    500: '#273b8a',
    950: '#000000',
  },
}

SCSS

$custom: #273b8a;
$custom-light: #6f70ad;
$custom-dark: #000000;

JSON

{
  "hex": "#273b8a",
  "rgb": {
    "r": 39,
    "g": 59,
    "b": 138
  },
  "hsl": {
    "h": 227.879,
    "s": 55.932,
    "l": 34.706
  },
  "oklch": {
    "l": 0.38555,
    "c": 0.13374,
    "h": 268.6
  },
  "luminance": 0.05394
}

Semantic roles & 50–950 ramp

primary

#273B8A

secondary

#B6A357

accent

#C149DF

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #273B8A

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

Preview Lab → · Contrast checker → · Palette generator →