#273A8A#273A8A

#273A8A is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.3% C 0.135 H 269.0°. Best body text is #FFFFFF at 10.20:1 contrast (WCAG AA passes).

Color values

HEX	#273A8A
RGB	rgb(39, 58, 138)
HSL	hsl(228, 56%, 35%)
HSV	hsv(228, 72%, 54%)
CMYK	cmyk(71.7%, 58%, 0%, 45.9%)
CIE-LAB	lab(27.55, 21.22, -46.88)
CIE-LCH	lch(27.55, 51.46, 294.35°)
OKLab	oklab(38.35% -0.0024 -0.135)
OKLCH	oklch(38.35% 0.135 269)
XYZ	xyz(6.9356, 5.2917, 24.6957)
Luminance	0.0529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273A8A #8A7727

analogous

#276C8A #273A8A #46278A

triadic

#273A8A #8A273A #3A8A27

tetradic

#273A8A #8A276C #8A7727 #278A46

square

#273A8A #8A276C #8A7727 #278A46

split-complementary

#273A8A #8A4627 #6C8A27

monochromatic

#0C122B #1A265A #273A8A #344EBA #5B71D1

Accessibility & contrast

On white

10.20

#273A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#273A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273A8A

10.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273A8A	#FFFFFF	#000000	##FFFFFF
##273A8A	1.00	10.20	2.06	10.20
#FFFFFF	10.20	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468D

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #273a8a;
/* rgb */ color: rgb(39, 58, 138);
/* oklch */ color: oklch(38.3% 0.135 269.0);

Tailwind

colors: {
  custom: {
    50: '#6f6fad',
    500: '#273a8a',
    950: '#000000',
  },
}

SCSS

$custom: #273a8a;
$custom-light: #6f6fad;
$custom-dark: #000000;

JSON

{
  "hex": "#273a8a",
  "rgb": {
    "r": 39,
    "g": 58,
    "b": 138
  },
  "hsl": {
    "h": 228.485,
    "s": 55.932,
    "l": 34.706
  },
  "oklch": {
    "l": 0.38347,
    "c": 0.13506,
    "h": 269
  },
  "luminance": 0.05292
}

Semantic roles & 50–950 ramp

primary

#273A8A

secondary

#B6A357

accent

#C249DF

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #273A8A

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

Preview Lab → · Contrast checker → · Palette generator →