#273AA4#273AA4

#273AA4 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.7% C 0.171 H 269.2°. Best body text is #FFFFFF at 9.43:1 contrast (WCAG AA passes).

Color values

HEX	#273AA4
RGB	rgb(39, 58, 164)
HSL	hsl(231, 62%, 40%)
HSV	hsv(231, 76%, 64%)
CMYK	cmyk(76.2%, 64.6%, 0%, 35.7%)
CIE-LAB	lab(29.75, 31.08, -59.18)
CIE-LCH	lch(29.75, 66.85, 297.71°)
OKLab	oklab(40.67% -0.0025 -0.1711)
OKLCH	oklch(40.67% 0.171 269.2)
XYZ	xyz(9.0483, 6.1368, 35.8224)
Luminance	0.0614 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273AA4 #A49127

analogous

#2779A4 #273AA4 #5327A4

triadic

#273AA4 #A4273A #3AA427

tetradic

#273AA4 #A42779 #A49127 #27A453

square

#273AA4 #A42779 #A49127 #27A453

split-complementary

#273AA4 #A45327 #79A427

monochromatic

#0F1741 #1B2973 #273AA4 #384FD0 #6A7BDC

Accessibility & contrast

On white

9.43

#273AA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#273AA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273AA4

9.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273AA4	#FFFFFF	#000000	##FFFFFF
##273AA4	1.00	9.43	2.23	9.43
#FFFFFF	9.43	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA7

Deuteranopia (green-blind)

#0040A2

Tritanopia (blue-blind)

#005669

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #273aa4;
/* rgb */ color: rgb(39, 58, 164);
/* oklch */ color: oklch(40.7% 0.171 269.2);

Tailwind

colors: {
  custom: {
    50: '#7570c0',
    500: '#273aa4',
    950: '#000000',
  },
}

SCSS

$custom: #273aa4;
$custom-light: #7570c0;
$custom-dark: #000000;

JSON

{
  "hex": "#273aa4",
  "rgb": {
    "r": 39,
    "g": 58,
    "b": 164
  },
  "hsl": {
    "h": 230.88,
    "s": 61.576,
    "l": 39.804
  },
  "oklch": {
    "l": 0.40669,
    "c": 0.17115,
    "h": 269.2
  },
  "luminance": 0.06138
}

Semantic roles & 50–950 ramp

primary

#273AA4

secondary

#C2B465

accent

#CC43E5

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #273AA4

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

Preview Lab → · Contrast checker → · Palette generator →