#273B8D#273B8D

#273B8D is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.138 H 268.7°. Best body text is #FFFFFF at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#273B8D
RGB	rgb(39, 59, 141)
HSL	hsl(228, 57%, 35%)
HSV	hsv(228, 72%, 55%)
CMYK	cmyk(72.3%, 58.2%, 0%, 44.7%)
CIE-LAB	lab(28.07, 21.69, -47.90)
CIE-LCH	lch(28.07, 52.58, 294.36°)
OKLab	oklab(38.81% -0.0031 -0.138)
OKLCH	oklch(38.81% 0.138 268.7)
XYZ	xyz(7.2067, 5.4816, 25.8724)
Luminance	0.0548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273B8D #8D7927

analogous

#276E8D #273B8D #46278D

triadic

#273B8D #8D273B #3B8D27

tetradic

#273B8D #8D276E #8D7927 #278D46

square

#273B8D #8D276E #8D7927 #278D46

split-complementary

#273B8D #8D4627 #6E8D27

monochromatic

#0C132D #1A275D #273B8D #344FBD #5C73D2

Accessibility & contrast

On white

10.02

#273B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#273B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273B8D

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273B8D	#FFFFFF	#000000	##FFFFFF
##273B8D	1.00	10.02	2.10	10.02
#FFFFFF	10.02	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004790

Deuteranopia (green-blind)

#003E8B

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #273b8d;
/* rgb */ color: rgb(39, 59, 141);
/* oklch */ color: oklch(38.8% 0.138 268.7);

Tailwind

colors: {
  custom: {
    50: '#6f70af',
    500: '#273b8d',
    950: '#000000',
  },
}

SCSS

$custom: #273b8d;
$custom-light: #6f70af;
$custom-dark: #000000;

JSON

{
  "hex": "#273b8d",
  "rgb": {
    "r": 39,
    "g": 59,
    "b": 141
  },
  "hsl": {
    "h": 228.235,
    "s": 56.667,
    "l": 35.294
  },
  "oklch": {
    "l": 0.38808,
    "c": 0.13806,
    "h": 268.7
  },
  "luminance": 0.05482
}

Semantic roles & 50–950 ramp

primary

#273B8D

secondary

#B7A559

accent

#C248E0

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #273B8D

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

Preview Lab → · Contrast checker → · Palette generator →