#273A8D#273A8D

#273A8D is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.139 H 269.1°. Best body text is #FFFFFF at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#273A8D
RGB	rgb(39, 58, 141)
HSL	hsl(229, 57%, 35%)
HSV	hsv(229, 72%, 55%)
CMYK	cmyk(72.3%, 58.9%, 0%, 44.7%)
CIE-LAB	lab(27.79, 22.37, -48.35)
CIE-LCH	lch(27.79, 53.27, 294.83°)
OKLab	oklab(38.6% -0.0023 -0.1393)
OKLCH	oklch(38.6% 0.139 269.1)
XYZ	xyz(7.1558, 5.3798, 25.8554)
Luminance	0.0538 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273A8D #8D7A27

analogous

#276D8D #273A8D #47278D

triadic

#273A8D #8D273A #3A8D27

tetradic

#273A8D #8D276D #8D7A27 #278D47

square

#273A8D #8D276D #8D7A27 #278D47

split-complementary

#273A8D #8D4727 #6D8D27

monochromatic

#0C132D #1A265D #273A8D #344EBD #5C72D2

Accessibility & contrast

On white

10.11

#273A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#273A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273A8D

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273A8D	#FFFFFF	#000000	##FFFFFF
##273A8D	1.00	10.11	2.08	10.11
#FFFFFF	10.11	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004690

Deuteranopia (green-blind)

#003D8B

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #273a8d;
/* rgb */ color: rgb(39, 58, 141);
/* oklch */ color: oklch(38.6% 0.139 269.1);

Tailwind

colors: {
  custom: {
    50: '#6f6faf',
    500: '#273a8d',
    950: '#000000',
  },
}

SCSS

$custom: #273a8d;
$custom-light: #6f6faf;
$custom-dark: #000000;

JSON

{
  "hex": "#273a8d",
  "rgb": {
    "r": 39,
    "g": 58,
    "b": 141
  },
  "hsl": {
    "h": 228.824,
    "s": 56.667,
    "l": 35.294
  },
  "oklch": {
    "l": 0.38603,
    "c": 0.13937,
    "h": 269.1
  },
  "luminance": 0.05381
}

Semantic roles & 50–950 ramp

primary

#273A8D

secondary

#B7A659

accent

#C448E0

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #273A8D

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

Preview Lab → · Contrast checker → · Palette generator →