#273B8B#273B8B

#273B8B is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.135 H 268.6°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#273B8B
RGB	rgb(39, 59, 139)
HSL	hsl(228, 56%, 35%)
HSV	hsv(228, 72%, 55%)
CMYK	cmyk(71.9%, 57.6%, 0%, 45.5%)
CIE-LAB	lab(27.91, 20.92, -46.92)
CIE-LCH	lch(27.91, 51.38, 294.03°)
OKLab	oklab(38.64% -0.0032 -0.1351)
OKLCH	oklch(38.64% 0.135 268.6)
XYZ	xyz(7.0593, 5.4226, 25.0957)
Luminance	0.0542 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273B8B #8B7727

analogous

#276D8B #273B8B #45278B

triadic

#273B8B #8B273B #3B8B27

tetradic

#273B8B #8B276D #8B7727 #278B45

square

#273B8B #8B276D #8B7727 #278B45

split-complementary

#273B8B #8B4527 #6D8B27

monochromatic

#0C122B #1A275B #273B8B #344FBB #5B73D1

Accessibility & contrast

On white

10.07

#273B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#273B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273B8B

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273B8B	#FFFFFF	#000000	##FFFFFF
##273B8B	1.00	10.07	2.08	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #273b8b;
/* rgb */ color: rgb(39, 59, 139);
/* oklch */ color: oklch(38.6% 0.135 268.6);

Tailwind

colors: {
  custom: {
    50: '#6f70ae',
    500: '#273b8b',
    950: '#000000',
  },
}

SCSS

$custom: #273b8b;
$custom-light: #6f70ae;
$custom-dark: #000000;

JSON

{
  "hex": "#273b8b",
  "rgb": {
    "r": 39,
    "g": 59,
    "b": 139
  },
  "hsl": {
    "h": 228,
    "s": 56.18,
    "l": 34.902
  },
  "oklch": {
    "l": 0.38639,
    "c": 0.13519,
    "h": 268.6
  },
  "luminance": 0.05423
}

Semantic roles & 50–950 ramp

primary

#273B8B

secondary

#B6A358

accent

#C148DF

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #273B8B

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

Preview Lab → · Contrast checker → · Palette generator →