#273B8E#273B8E

#273B8E is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.9% C 0.139 H 268.7°. Best body text is #FFFFFF at 9.99:1 contrast (WCAG AA passes).

Color values

HEX	#273B8E
RGB	rgb(39, 59, 142)
HSL	hsl(228, 57%, 35%)
HSV	hsv(228, 73%, 56%)
CMYK	cmyk(72.5%, 58.5%, 0%, 44.3%)
CIE-LAB	lab(28.14, 22.08, -48.39)
CIE-LCH	lch(28.14, 53.19, 294.52°)
OKLab	oklab(38.89% -0.0031 -0.1395)
OKLCH	oklch(38.89% 0.139 268.7)
XYZ	xyz(7.2815, 5.5115, 26.2660)
Luminance	0.0551 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273B8E #8E7A27

analogous

#276E8E #273B8E #47278E

triadic

#273B8E #8E273B #3B8E27

tetradic

#273B8E #8E276E #8E7A27 #278E47

square

#273B8E #8E276E #8E7A27 #278E47

split-complementary

#273B8E #8E4727 #6E8E27

monochromatic

#0D132E #1A275E #273B8E #344FBE #5D74D2

Accessibility & contrast

On white

9.99

#273B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#273B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273B8E

9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273B8E	#FFFFFF	#000000	##FFFFFF
##273B8E	1.00	9.99	2.10	9.99
#FFFFFF	9.99	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#003E8C

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #273b8e;
/* rgb */ color: rgb(39, 59, 142);
/* oklch */ color: oklch(38.9% 0.139 268.7);

Tailwind

colors: {
  custom: {
    50: '#7070b0',
    500: '#273b8e',
    950: '#000000',
  },
}

SCSS

$custom: #273b8e;
$custom-light: #7070b0;
$custom-dark: #000000;

JSON

{
  "hex": "#273b8e",
  "rgb": {
    "r": 39,
    "g": 59,
    "b": 142
  },
  "hsl": {
    "h": 228.35,
    "s": 56.906,
    "l": 35.49
  },
  "oklch": {
    "l": 0.38893,
    "c": 0.13949,
    "h": 268.7
  },
  "luminance": 0.05512
}

Semantic roles & 50–950 ramp

primary

#273B8E

secondary

#B8A559

accent

#C348E0

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #273B8E

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

Preview Lab → · Contrast checker → · Palette generator →