#273F9B#273F9B

#273F9B is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.8% C 0.153 H 267.8°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#273F9B
RGB	rgb(39, 63, 155)
HSL	hsl(228, 60%, 38%)
HSV	hsv(228, 75%, 61%)
CMYK	cmyk(74.8%, 59.4%, 0%, 39.2%)
CIE-LAB	lab(30.28, 24.35, -52.87)
CIE-LCH	lch(30.28, 58.20, 294.73°)
OKLab	oklab(40.82% -0.0058 -0.1526)
OKLCH	oklch(40.82% 0.153 267.8)
XYZ	xyz(8.5285, 6.3520, 31.7806)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273F9B #9B8327

analogous

#27799B #273F9B #49279B

triadic

#273F9B #9B273F #3F9B27

tetradic

#273F9B #9B2779 #9B8327 #279B49

square

#273F9B #9B2779 #9B8327 #279B49

split-complementary

#273F9B #9B4927 #799B27

monochromatic

#0E1739 #1B2B6A #273F9B #3353CC #647CD8

Accessibility & contrast

On white

9.25

#273F9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#273F9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273F9B

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273F9B	#FFFFFF	#000000	##FFFFFF
##273F9B	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9E

Deuteranopia (green-blind)

#004299

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #273f9b;
/* rgb */ color: rgb(39, 63, 155);
/* oklch */ color: oklch(40.8% 0.153 267.8);

Tailwind

colors: {
  custom: {
    50: '#7273b9',
    500: '#273f9b',
    950: '#000000',
  },
}

SCSS

$custom: #273f9b;
$custom-light: #7273b9;
$custom-dark: #000000;

JSON

{
  "hex": "#273f9b",
  "rgb": {
    "r": 39,
    "g": 63,
    "b": 155
  },
  "hsl": {
    "h": 227.586,
    "s": 59.794,
    "l": 38.039
  },
  "oklch": {
    "l": 0.40822,
    "c": 0.15267,
    "h": 267.8
  },
  "luminance": 0.06353
}

Semantic roles & 50–950 ramp

primary

#273F9B

secondary

#BEAA60

accent

#C245E3

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #273F9B

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

Preview Lab → · Contrast checker → · Palette generator →