#273A8B#273A8B

#273A8B is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.137 H 269.0°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#273A8B
RGB	rgb(39, 58, 139)
HSL	hsl(229, 56%, 35%)
HSV	hsv(229, 72%, 55%)
CMYK	cmyk(71.9%, 58.3%, 0%, 45.5%)
CIE-LAB	lab(27.63, 21.61, -47.37)
CIE-LCH	lch(27.63, 52.07, 294.52°)
OKLab	oklab(38.43% -0.0023 -0.1365)
OKLCH	oklch(38.43% 0.137 269)
XYZ	xyz(7.0084, 5.3208, 25.0788)
Luminance	0.0532 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273A8B #8B7827

analogous

#276C8B #273A8B #46278B

triadic

#273A8B #8B273A #3A8B27

tetradic

#273A8B #8B276C #8B7827 #278B46

square

#273A8B #8B276C #8B7827 #278B46

split-complementary

#273A8B #8B4627 #6C8B27

monochromatic

#0C122B #1A265B #273A8B #344EBB #5B72D1

Accessibility & contrast

On white

10.17

#273A8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#273A8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273A8B

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273A8B	#FFFFFF	#000000	##FFFFFF
##273A8B	1.00	10.17	2.06	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #273a8b;
/* rgb */ color: rgb(39, 58, 139);
/* oklch */ color: oklch(38.4% 0.137 269.0);

Tailwind

colors: {
  custom: {
    50: '#6f6fae',
    500: '#273a8b',
    950: '#000000',
  },
}

SCSS

$custom: #273a8b;
$custom-light: #6f6fae;
$custom-dark: #000000;

JSON

{
  "hex": "#273a8b",
  "rgb": {
    "r": 39,
    "g": 58,
    "b": 139
  },
  "hsl": {
    "h": 228.6,
    "s": 56.18,
    "l": 34.902
  },
  "oklch": {
    "l": 0.38432,
    "c": 0.1365,
    "h": 269
  },
  "luminance": 0.05322
}

Semantic roles & 50–950 ramp

primary

#273A8B

secondary

#B6A458

accent

#C348DF

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #273A8B

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

Preview Lab → · Contrast checker → · Palette generator →