#273CB1#273CB1

#273CB1 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.3% C 0.186 H 268.7°. Best body text is #FFFFFF at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#273CB1
RGB	rgb(39, 60, 177)
HSL	hsl(231, 64%, 42%)
HSV	hsv(231, 78%, 69%)
CMYK	cmyk(78%, 66.1%, 0%, 30.6%)
CIE-LAB	lab(31.43, 34.59, -64.22)
CIE-LCH	lch(31.43, 72.95, 298.31°)
OKLab	oklab(42.26% -0.0043 -0.1859)
OKLCH	oklch(42.26% 0.186 268.7)
XYZ	xyz(10.3856, 6.8362, 42.3586)
Luminance	0.0684 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273CB1 #B19C27

analogous

#2781B1 #273CB1 #5727B1

triadic

#273CB1 #B1273C #3CB127

tetradic

#273CB1 #B12781 #B19C27 #27B157

square

#273CB1 #B12781 #B19C27 #27B157

split-complementary

#273CB1 #B15727 #81B127

monochromatic

#111A4D #1C2B7F #273CB1 #4057D5 #7283E0

Accessibility & contrast

On white

8.87

#273CB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#273CB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273CB1

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273CB1	#FFFFFF	#000000	##FFFFFF
##273CB1	1.00	8.87	2.37	8.87
#FFFFFF	8.87	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0043AF

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #273cb1;
/* rgb */ color: rgb(39, 60, 177);
/* oklch */ color: oklch(42.3% 0.186 268.7);

Tailwind

colors: {
  custom: {
    50: '#7871c9',
    500: '#273cb1',
    950: '#000000',
  },
}

SCSS

$custom: #273cb1;
$custom-light: #7871c9;
$custom-dark: #000000;

JSON

{
  "hex": "#273cb1",
  "rgb": {
    "r": 39,
    "g": 60,
    "b": 177
  },
  "hsl": {
    "h": 230.87,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42261,
    "c": 0.18592,
    "h": 268.7
  },
  "luminance": 0.06837
}

Semantic roles & 50–950 ramp

primary

#273CB1

secondary

#C7B96D

accent

#CE41E7

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #273CB1

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

Preview Lab → · Contrast checker → · Palette generator →