#273F9E#273F9E

#273F9E is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.1% C 0.157 H 267.9°. Best body text is #FFFFFF at 9.17:1 contrast (WCAG AA passes).

Color values

HEX	#273F9E
RGB	rgb(39, 63, 158)
HSL	hsl(228, 60%, 39%)
HSV	hsv(228, 75%, 62%)
CMYK	cmyk(75.3%, 60.1%, 0%, 38%)
CIE-LAB	lab(30.53, 25.49, -54.29)
CIE-LCH	lch(30.53, 59.98, 295.16°)
OKLab	oklab(41.08% -0.0058 -0.1567)
OKLCH	oklch(41.08% 0.157 267.9)
XYZ	xyz(8.7836, 6.4540, 33.1240)
Luminance	0.0645 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273F9E #9E8627

analogous

#277A9E #273F9E #4A279E

triadic

#273F9E #9E273F #3F9E27

tetradic

#273F9E #9E277A #9E8627 #279E4A

square

#273F9E #9E277A #9E8627 #279E4A

split-complementary

#273F9E #9E4A27 #7A9E27

monochromatic

#0F183C #1B2B6D #273F9E #3554CD #667DD9

Accessibility & contrast

On white

9.17

#273F9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#273F9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273F9E

9.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273F9E	#FFFFFF	#000000	##FFFFFF
##273F9E	1.00	9.17	2.29	9.17
#FFFFFF	9.17	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA1

Deuteranopia (green-blind)

#00439C

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #273f9e;
/* rgb */ color: rgb(39, 63, 158);
/* oklch */ color: oklch(41.1% 0.157 267.9);

Tailwind

colors: {
  custom: {
    50: '#7373bb',
    500: '#273f9e',
    950: '#000000',
  },
}

SCSS

$custom: #273f9e;
$custom-light: #7373bb;
$custom-dark: #000000;

JSON

{
  "hex": "#273f9e",
  "rgb": {
    "r": 39,
    "g": 63,
    "b": 158
  },
  "hsl": {
    "h": 227.899,
    "s": 60.406,
    "l": 38.627
  },
  "oklch": {
    "l": 0.41083,
    "c": 0.15683,
    "h": 267.9
  },
  "luminance": 0.06455
}

Semantic roles & 50–950 ramp

primary

#273F9E

secondary

#BFAC62

accent

#C344E4

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #273F9E

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

Preview Lab → · Contrast checker → · Palette generator →