#273DB1#273DB1

#273DB1 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.4% C 0.185 H 268.5°. Best body text is #FFFFFF at 8.79:1 contrast (WCAG AA passes).

Color values

HEX	#273DB1
RGB	rgb(39, 61, 177)
HSL	hsl(230, 64%, 42%)
HSV	hsv(230, 78%, 69%)
CMYK	cmyk(78%, 65.5%, 0%, 30.6%)
CIE-LAB	lab(31.67, 33.95, -63.82)
CIE-LCH	lch(31.67, 72.29, 298.01°)
OKLab	oklab(42.44% -0.0049 -0.1847)
OKLCH	oklch(42.44% 0.185 268.5)
XYZ	xyz(10.4385, 6.9420, 42.3762)
Luminance	0.0694 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273DB1 #B19B27

analogous

#2782B1 #273DB1 #5627B1

triadic

#273DB1 #B1273D #3DB127

tetradic

#273DB1 #B12782 #B19B27 #27B156

square

#273DB1 #B12782 #B19B27 #27B156

split-complementary

#273DB1 #B15627 #82B127

monochromatic

#111A4D #1C2C7F #273DB1 #4058D5 #7284E0

Accessibility & contrast

On white

8.79

#273DB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#273DB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273DB1

8.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273DB1	#FFFFFF	#000000	##FFFFFF
##273DB1	1.00	8.79	2.39	8.79
#FFFFFF	8.79	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0044AF

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #273db1;
/* rgb */ color: rgb(39, 61, 177);
/* oklch */ color: oklch(42.4% 0.185 268.5);

Tailwind

colors: {
  custom: {
    50: '#7872c9',
    500: '#273db1',
    950: '#000000',
  },
}

SCSS

$custom: #273db1;
$custom-light: #7872c9;
$custom-dark: #000000;

JSON

{
  "hex": "#273db1",
  "rgb": {
    "r": 39,
    "g": 61,
    "b": 177
  },
  "hsl": {
    "h": 230.435,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42439,
    "c": 0.18476,
    "h": 268.5
  },
  "luminance": 0.06943
}

Semantic roles & 50–950 ramp

primary

#273DB1

secondary

#C7B96D

accent

#CC41E7

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #273DB1

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

Preview Lab → · Contrast checker → · Palette generator →