#273B81#273B81

#273B81 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.8% C 0.121 H 268.2°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#273B81
RGB	rgb(39, 59, 129)
HSL	hsl(227, 54%, 33%)
HSV	hsv(227, 70%, 51%)
CMYK	cmyk(69.8%, 54.3%, 0%, 49.4%)
CIE-LAB	lab(27.14, 17.06, -41.94)
CIE-LCH	lch(27.14, 45.28, 292.14°)
OKLab	oklab(37.82% -0.0039 -0.1205)
OKLCH	oklch(37.82% 0.121 268.2)
XYZ	xyz(6.3618, 5.1436, 21.4222)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273B81 #816D27

analogous

#276881 #273B81 #402781

triadic

#273B81 #81273B #3B8127

tetradic

#273B81 #812768 #816D27 #278140

square

#273B81 #812768 #816D27 #278140

split-complementary

#273B81 #814027 #688127

monochromatic

#0B1023 #192652 #273B81 #3550B0 #5671CC

Accessibility & contrast

On white

10.35

#273B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#273B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273B81

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273B81	#FFFFFF	#000000	##FFFFFF
##273B81	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D4483

Deuteranopia (green-blind)

#003C80

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #273b81;
/* rgb */ color: rgb(39, 59, 129);
/* oklch */ color: oklch(37.8% 0.121 268.2);

Tailwind

colors: {
  custom: {
    50: '#6d70a6',
    500: '#273b81',
    950: '#000000',
  },
}

SCSS

$custom: #273b81;
$custom-light: #6d70a6;
$custom-dark: #000000;

JSON

{
  "hex": "#273b81",
  "rgb": {
    "r": 39,
    "g": 59,
    "b": 129
  },
  "hsl": {
    "h": 226.667,
    "s": 53.571,
    "l": 32.941
  },
  "oklch": {
    "l": 0.37819,
    "c": 0.12055,
    "h": 268.2
  },
  "luminance": 0.05144
}

Semantic roles & 50–950 ramp

primary

#273B81

secondary

#B19C53

accent

#BC4BDD

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #273B81

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

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