#273FB1#273FB1

#273FB1 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.8% C 0.182 H 268.1°. Best body text is #FFFFFF at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#273FB1
RGB	rgb(39, 63, 177)
HSL	hsl(230, 64%, 42%)
HSV	hsv(230, 78%, 69%)
CMYK	cmyk(78%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(32.17, 32.66, -63.02)
CIE-LCH	lch(32.17, 70.97, 297.39°)
OKLab	oklab(42.8% -0.006 -0.1823)
OKLCH	oklch(42.8% 0.182 268.1)
XYZ	xyz(10.5473, 7.1595, 42.4125)
Luminance	0.0716 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273FB1 #B19927

analogous

#2784B1 #273FB1 #5427B1

triadic

#273FB1 #B1273F #3FB127

tetradic

#273FB1 #B12784 #B19927 #27B154

square

#273FB1 #B12784 #B19927 #27B154

split-complementary

#273FB1 #B15427 #84B127

monochromatic

#111B4D #1C2D7F #273FB1 #405AD5 #7285E0

Accessibility & contrast

On white

8.63

#273FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#273FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273FB1

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273FB1	#FFFFFF	#000000	##FFFFFF
##273FB1	1.00	8.63	2.43	8.63
#FFFFFF	8.63	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0045AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #273fb1;
/* rgb */ color: rgb(39, 63, 177);
/* oklch */ color: oklch(42.8% 0.182 268.1);

Tailwind

colors: {
  custom: {
    50: '#7874c9',
    500: '#273fb1',
    950: '#000000',
  },
}

SCSS

$custom: #273fb1;
$custom-light: #7874c9;
$custom-dark: #000000;

JSON

{
  "hex": "#273fb1",
  "rgb": {
    "r": 39,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 229.565,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42801,
    "c": 0.18242,
    "h": 268.1
  },
  "luminance": 0.07161
}

Semantic roles & 50–950 ramp

primary

#273FB1

secondary

#C7B76D

accent

#CA41E7

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #273FB1

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

Preview Lab → · Contrast checker → · Palette generator →