#273EB1#273EB1

#273EB1 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.184 H 268.3°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#273EB1
RGB	rgb(39, 62, 177)
HSL	hsl(230, 64%, 42%)
HSV	hsv(230, 78%, 69%)
CMYK	cmyk(78%, 65%, 0%, 30.6%)
CIE-LAB	lab(31.92, 33.30, -63.42)
CIE-LCH	lch(31.92, 71.63, 297.70°)
OKLab	oklab(42.62% -0.0054 -0.1835)
OKLCH	oklch(42.62% 0.184 268.3)
XYZ	xyz(10.4924, 7.0497, 42.3942)
Luminance	0.0705 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273EB1 #B19A27

analogous

#2783B1 #273EB1 #5527B1

triadic

#273EB1 #B1273E #3EB127

tetradic

#273EB1 #B12783 #B19A27 #27B155

square

#273EB1 #B12783 #B19A27 #27B155

split-complementary

#273EB1 #B15527 #83B127

monochromatic

#111B4D #1C2C7F #273EB1 #4059D5 #7285E0

Accessibility & contrast

On white

8.71

#273EB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#273EB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273EB1

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273EB1	#FFFFFF	#000000	##FFFFFF
##273EB1	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0045AF

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #273eb1;
/* rgb */ color: rgb(39, 62, 177);
/* oklch */ color: oklch(42.6% 0.184 268.3);

Tailwind

colors: {
  custom: {
    50: '#7873c9',
    500: '#273eb1',
    950: '#000000',
  },
}

SCSS

$custom: #273eb1;
$custom-light: #7873c9;
$custom-dark: #000000;

JSON

{
  "hex": "#273eb1",
  "rgb": {
    "r": 39,
    "g": 62,
    "b": 177
  },
  "hsl": {
    "h": 230,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42619,
    "c": 0.18359,
    "h": 268.3
  },
  "luminance": 0.07051
}

Semantic roles & 50–950 ramp

primary

#273EB1

secondary

#C7B86D

accent

#CB41E7

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #273EB1

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

Preview Lab → · Contrast checker → · Palette generator →