#273BB1#273BB1

#273BB1 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.1% C 0.187 H 268.9°. Best body text is #FFFFFF at 8.95:1 contrast (WCAG AA passes).

Color values

HEX	#273BB1
RGB	rgb(39, 59, 177)
HSL	hsl(231, 64%, 42%)
HSV	hsv(231, 78%, 69%)
CMYK	cmyk(78%, 66.7%, 0%, 30.6%)
CIE-LAB	lab(31.19, 35.24, -64.62)
CIE-LCH	lch(31.19, 73.60, 298.60°)
OKLab	oklab(42.09% -0.0037 -0.187)
OKLCH	oklch(42.09% 0.187 268.9)
XYZ	xyz(10.3337, 6.7324, 42.3413)
Luminance	0.0673 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273BB1 #B19D27

analogous

#2780B1 #273BB1 #5827B1

triadic

#273BB1 #B1273B #3BB127

tetradic

#273BB1 #B12780 #B19D27 #27B158

square

#273BB1 #B12780 #B19D27 #27B158

split-complementary

#273BB1 #B15827 #80B127

monochromatic

#111A4D #1C2A7F #273BB1 #4056D5 #7282E0

Accessibility & contrast

On white

8.95

#273BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#273BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273BB1

8.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273BB1	#FFFFFF	#000000	##FFFFFF
##273BB1	1.00	8.95	2.35	8.95
#FFFFFF	8.95	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B5

Deuteranopia (green-blind)

#0043AF

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #273bb1;
/* rgb */ color: rgb(39, 59, 177);
/* oklch */ color: oklch(42.1% 0.187 268.9);

Tailwind

colors: {
  custom: {
    50: '#7871c9',
    500: '#273bb1',
    950: '#000000',
  },
}

SCSS

$custom: #273bb1;
$custom-light: #7871c9;
$custom-dark: #000000;

JSON

{
  "hex": "#273bb1",
  "rgb": {
    "r": 39,
    "g": 59,
    "b": 177
  },
  "hsl": {
    "h": 231.304,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42085,
    "c": 0.18708,
    "h": 268.9
  },
  "luminance": 0.06734
}

Semantic roles & 50–950 ramp

primary

#273BB1

secondary

#C7BA6D

accent

#CF41E7

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #273BB1

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

Preview Lab → · Contrast checker → · Palette generator →