#273FB0#273FB0

#273FB0 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.181 H 268.1°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#273FB0
RGB	rgb(39, 63, 176)
HSL	hsl(229, 64%, 42%)
HSV	hsv(229, 78%, 69%)
CMYK	cmyk(77.8%, 64.2%, 0%, 31%)
CIE-LAB	lab(32.08, 32.28, -62.57)
CIE-LCH	lch(32.08, 70.40, 297.29°)
OKLab	oklab(42.71% -0.006 -0.181)
OKLCH	oklch(42.71% 0.181 268.1)
XYZ	xyz(10.4480, 7.1198, 41.8895)
Luminance	0.0712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273FB0 #B09827

analogous

#2784B0 #273FB0 #5427B0

triadic

#273FB0 #B0273F #3FB027

tetradic

#273FB0 #B02784 #B09827 #27B054

square

#273FB0 #B02784 #B09827 #27B054

split-complementary

#273FB0 #B05427 #84B027

monochromatic

#111B4C #1C2D7E #273FB0 #405AD5 #7285E0

Accessibility & contrast

On white

8.66

#273FB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#273FB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273FB0

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273FB0	#FFFFFF	#000000	##FFFFFF
##273FB0	1.00	8.66	2.42	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B4

Deuteranopia (green-blind)

#0045AE

Tritanopia (blue-blind)

#005D71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #273fb0;
/* rgb */ color: rgb(39, 63, 176);
/* oklch */ color: oklch(42.7% 0.181 268.1);

Tailwind

colors: {
  custom: {
    50: '#7874c9',
    500: '#273fb0',
    950: '#000000',
  },
}

SCSS

$custom: #273fb0;
$custom-light: #7874c9;
$custom-dark: #000000;

JSON

{
  "hex": "#273fb0",
  "rgb": {
    "r": 39,
    "g": 63,
    "b": 176
  },
  "hsl": {
    "h": 229.489,
    "s": 63.721,
    "l": 42.157
  },
  "oklch": {
    "l": 0.42708,
    "c": 0.1811,
    "h": 268.1
  },
  "luminance": 0.07121
}

Semantic roles & 50–950 ramp

primary

#273FB0

secondary

#C7B76C

accent

#CA41E7

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #273FB0

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

Preview Lab → · Contrast checker → · Palette generator →