#273D99#273D99

#273D99 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.2% C 0.152 H 268.4°. Best body text is #FFFFFF at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#273D99
RGB	rgb(39, 61, 153)
HSL	hsl(228, 59%, 38%)
HSV	hsv(228, 75%, 60%)
CMYK	cmyk(74.5%, 60.1%, 0%, 40%)
CIE-LAB	lab(29.58, 24.93, -52.79)
CIE-LCH	lch(29.58, 58.38, 295.28°)
OKLab	oklab(40.25% -0.0044 -0.1524)
OKLCH	oklch(40.25% 0.152 268.4)
XYZ	xyz(8.2532, 6.0679, 30.8671)
Luminance	0.0607 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273D99 #998327

analogous

#277699 #273D99 #4A2799

triadic

#273D99 #99273D #3D9927

tetradic

#273D99 #992776 #998327 #27994A

square

#273D99 #992776 #998327 #27994A

split-complementary

#273D99 #994A27 #769927

monochromatic

#0E1637 #1B2A68 #273D99 #3350CA #637AD7

Accessibility & contrast

On white

9.49

#273D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#273D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273D99

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273D99	#FFFFFF	#000000	##FFFFFF
##273D99	1.00	9.49	2.21	9.49
#FFFFFF	9.49	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9C

Deuteranopia (green-blind)

#004197

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #273d99;
/* rgb */ color: rgb(39, 61, 153);
/* oklch */ color: oklch(40.2% 0.152 268.4);

Tailwind

colors: {
  custom: {
    50: '#7272b8',
    500: '#273d99',
    950: '#000000',
  },
}

SCSS

$custom: #273d99;
$custom-light: #7272b8;
$custom-dark: #000000;

JSON

{
  "hex": "#273d99",
  "rgb": {
    "r": 39,
    "g": 61,
    "b": 153
  },
  "hsl": {
    "h": 228.421,
    "s": 59.375,
    "l": 37.647
  },
  "oklch": {
    "l": 0.40248,
    "c": 0.15242,
    "h": 268.4
  },
  "luminance": 0.06069
}

Semantic roles & 50–950 ramp

primary

#273D99

secondary

#BDAB5F

accent

#C445E3

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #273D99

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

Preview Lab → · Contrast checker → · Palette generator →