#273AB1#273AB1

#273AB1 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.9% C 0.188 H 269.0°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#273AB1
RGB	rgb(39, 58, 177)
HSL	hsl(232, 64%, 42%)
HSV	hsv(232, 78%, 69%)
CMYK	cmyk(78%, 67.2%, 0%, 30.6%)
CIE-LAB	lab(30.95, 35.87, -65.01)
CIE-LCH	lch(30.95, 74.25, 298.89°)
OKLab	oklab(41.91% -0.0032 -0.1882)
OKLCH	oklch(41.91% 0.188 269)
XYZ	xyz(10.2828, 6.6306, 42.3243)
Luminance	0.0663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273AB1 #B19E27

analogous

#277FB1 #273AB1 #5927B1

triadic

#273AB1 #B1273A #3AB127

tetradic

#273AB1 #B1277F #B19E27 #27B159

square

#273AB1 #B1277F #B19E27 #27B159

split-complementary

#273AB1 #B15927 #7FB127

monochromatic

#11194D #1C2A7F #273AB1 #4055D5 #7281E0

Accessibility & contrast

On white

9.03

#273AB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#273AB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273AB1

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273AB1	#FFFFFF	#000000	##FFFFFF
##273AB1	1.00	9.03	2.33	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B5

Deuteranopia (green-blind)

#0042AF

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #273ab1;
/* rgb */ color: rgb(39, 58, 177);
/* oklch */ color: oklch(41.9% 0.188 269.0);

Tailwind

colors: {
  custom: {
    50: '#7870c9',
    500: '#273ab1',
    950: '#000000',
  },
}

SCSS

$custom: #273ab1;
$custom-light: #7870c9;
$custom-dark: #000000;

JSON

{
  "hex": "#273ab1",
  "rgb": {
    "r": 39,
    "g": 58,
    "b": 177
  },
  "hsl": {
    "h": 231.739,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.4191,
    "c": 0.18822,
    "h": 269
  },
  "luminance": 0.06632
}

Semantic roles & 50–950 ramp

primary

#273AB1

secondary

#C7BB6D

accent

#D041E7

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #273AB1

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

Preview Lab → · Contrast checker → · Palette generator →