#273AA1#273AA1

#273AA1 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.4% C 0.167 H 269.2°. Best body text is #FFFFFF at 9.52:1 contrast (WCAG AA passes).

Color values

HEX	#273AA1
RGB	rgb(39, 58, 161)
HSL	hsl(231, 61%, 39%)
HSV	hsv(231, 76%, 63%)
CMYK	cmyk(75.8%, 64%, 0%, 36.9%)
CIE-LAB	lab(29.49, 29.96, -57.81)
CIE-LCH	lch(29.49, 65.11, 297.40°)
OKLab	oklab(40.39% -0.0023 -0.1671)
OKLCH	oklch(40.39% 0.167 269.2)
XYZ	xyz(8.7806, 6.0297, 34.4124)
Luminance	0.0603 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273AA1 #A18E27

analogous

#2777A1 #273AA1 #5127A1

triadic

#273AA1 #A1273A #3AA127

tetradic

#273AA1 #A12777 #A18E27 #27A151

square

#273AA1 #A12777 #A18E27 #27A151

split-complementary

#273AA1 #A15127 #77A127

monochromatic

#0F173E #1B2870 #273AA1 #374ECE #687ADA

Accessibility & contrast

On white

9.52

#273AA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#273AA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273AA1

9.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273AA1	#FFFFFF	#000000	##FFFFFF
##273AA1	1.00	9.52	2.21	9.52
#FFFFFF	9.52	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA4

Deuteranopia (green-blind)

#00409F

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #273aa1;
/* rgb */ color: rgb(39, 58, 161);
/* oklch */ color: oklch(40.4% 0.167 269.2);

Tailwind

colors: {
  custom: {
    50: '#7470be',
    500: '#273aa1',
    950: '#000000',
  },
}

SCSS

$custom: #273aa1;
$custom-light: #7470be;
$custom-dark: #000000;

JSON

{
  "hex": "#273aa1",
  "rgb": {
    "r": 39,
    "g": 58,
    "b": 161
  },
  "hsl": {
    "h": 230.656,
    "s": 61,
    "l": 39.216
  },
  "oklch": {
    "l": 0.4039,
    "c": 0.16713,
    "h": 269.2
  },
  "luminance": 0.06031
}

Semantic roles & 50–950 ramp

primary

#273AA1

secondary

#C0B263

accent

#CB44E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #273AA1

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

Preview Lab → · Contrast checker → · Palette generator →