#273F8B#273F8B

#273F8B is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.5% C 0.130 H 267.0°. Best body text is #FFFFFF at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#273F8B
RGB	rgb(39, 63, 139)
HSL	hsl(226, 56%, 35%)
HSV	hsv(226, 72%, 55%)
CMYK	cmyk(71.9%, 54.7%, 0%, 45.5%)
CIE-LAB	lab(29.03, 18.18, -45.10)
CIE-LCH	lch(29.03, 48.63, 291.95°)
OKLab	oklab(39.49% -0.0067 -0.1297)
OKLCH	oklch(39.49% 0.13 267)
XYZ	xyz(7.2728, 5.8497, 25.1669)
Luminance	0.0585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273F8B #8B7327

analogous

#27718B #273F8B #41278B

triadic

#273F8B #8B273F #3F8B27

tetradic

#273F8B #8B2771 #8B7327 #278B41

square

#273F8B #8B2771 #8B7327 #278B41

split-complementary

#273F8B #8B4127 #718B27

monochromatic

#0C142B #1A295B #273F8B #3455BB #5B78D1

Accessibility & contrast

On white

9.68

#273F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#273F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273F8B

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273F8B	#FFFFFF	#000000	##FFFFFF
##273F8B	1.00	9.68	2.17	9.68
#FFFFFF	9.68	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#08498E

Deuteranopia (green-blind)

#004089

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #273f8b;
/* rgb */ color: rgb(39, 63, 139);
/* oklch */ color: oklch(39.5% 0.130 267.0);

Tailwind

colors: {
  custom: {
    50: '#6f73ad',
    500: '#273f8b',
    950: '#000000',
  },
}

SCSS

$custom: #273f8b;
$custom-light: #6f73ad;
$custom-dark: #000000;

JSON

{
  "hex": "#273f8b",
  "rgb": {
    "r": 39,
    "g": 63,
    "b": 139
  },
  "hsl": {
    "h": 225.6,
    "s": 56.18,
    "l": 34.902
  },
  "oklch": {
    "l": 0.39485,
    "c": 0.1299,
    "h": 267
  },
  "luminance": 0.0585
}

Semantic roles & 50–950 ramp

primary

#273F8B

secondary

#B69F58

accent

#BB48DF

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #273F8B

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

Preview Lab → · Contrast checker → · Palette generator →