#273DB0#273DB0

#273DB0 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.3% C 0.183 H 268.5°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#273DB0
RGB	rgb(39, 61, 176)
HSL	hsl(230, 64%, 42%)
HSV	hsv(230, 78%, 69%)
CMYK	cmyk(77.8%, 65.3%, 0%, 31%)
CIE-LAB	lab(31.58, 33.58, -63.38)
CIE-LCH	lch(31.58, 71.72, 297.92°)
OKLab	oklab(42.35% -0.0048 -0.1834)
OKLCH	oklch(42.35% 0.183 268.5)
XYZ	xyz(10.3392, 6.9023, 41.8532)
Luminance	0.0690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273DB0 #B09A27

analogous

#2782B0 #273DB0 #5627B0

triadic

#273DB0 #B0273D #3DB027

tetradic

#273DB0 #B02782 #B09A27 #27B056

square

#273DB0 #B02782 #B09A27 #27B056

split-complementary

#273DB0 #B05627 #82B027

monochromatic

#111A4C #1C2C7E #273DB0 #4058D5 #7283E0

Accessibility & contrast

On white

8.82

#273DB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#273DB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273DB0

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273DB0	#FFFFFF	#000000	##FFFFFF
##273DB0	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B4

Deuteranopia (green-blind)

#0044AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #273db0;
/* rgb */ color: rgb(39, 61, 176);
/* oklch */ color: oklch(42.3% 0.183 268.5);

Tailwind

colors: {
  custom: {
    50: '#7872c9',
    500: '#273db0',
    950: '#000000',
  },
}

SCSS

$custom: #273db0;
$custom-light: #7872c9;
$custom-dark: #000000;

JSON

{
  "hex": "#273db0",
  "rgb": {
    "r": 39,
    "g": 61,
    "b": 176
  },
  "hsl": {
    "h": 230.365,
    "s": 63.721,
    "l": 42.157
  },
  "oklch": {
    "l": 0.42345,
    "c": 0.18345,
    "h": 268.5
  },
  "luminance": 0.06903
}

Semantic roles & 50–950 ramp

primary

#273DB0

secondary

#C7B86C

accent

#CC41E7

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #273DB0

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

Preview Lab → · Contrast checker → · Palette generator →