#273FA4#273FA4

#273FA4 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.6% C 0.165 H 268.0°. Best body text is #FFFFFF at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#273FA4
RGB	rgb(39, 63, 164)
HSL	hsl(228, 62%, 40%)
HSV	hsv(228, 76%, 64%)
CMYK	cmyk(76.2%, 61.6%, 0%, 35.7%)
CIE-LAB	lab(31.03, 27.78, -57.09)
CIE-LCH	lch(31.03, 63.49, 295.94°)
OKLab	oklab(41.61% -0.0057 -0.165)
OKLCH	oklch(41.61% 0.165 268)
XYZ	xyz(9.3127, 6.6657, 35.9106)
Luminance	0.0667 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273FA4 #A48C27

analogous

#277EA4 #273FA4 #4E27A4

triadic

#273FA4 #A4273F #3FA427

tetradic

#273FA4 #A4277E #A48C27 #27A44E

square

#273FA4 #A4277E #A48C27 #27A44E

split-complementary

#273FA4 #A44E27 #7EA427

monochromatic

#0F1941 #1B2C73 #273FA4 #3855D0 #6A80DC

Accessibility & contrast

On white

9.00

#273FA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#273FA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273FA4

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273FA4	#FFFFFF	#000000	##FFFFFF
##273FA4	1.00	9.00	2.33	9.00
#FFFFFF	9.00	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA7

Deuteranopia (green-blind)

#0043A2

Tritanopia (blue-blind)

#00596B

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #273fa4;
/* rgb */ color: rgb(39, 63, 164);
/* oklch */ color: oklch(41.6% 0.165 268.0);

Tailwind

colors: {
  custom: {
    50: '#7573c0',
    500: '#273fa4',
    950: '#000000',
  },
}

SCSS

$custom: #273fa4;
$custom-light: #7573c0;
$custom-dark: #000000;

JSON

{
  "hex": "#273fa4",
  "rgb": {
    "r": 39,
    "g": 63,
    "b": 164
  },
  "hsl": {
    "h": 228.48,
    "s": 61.576,
    "l": 39.804
  },
  "oklch": {
    "l": 0.41613,
    "c": 0.16505,
    "h": 268
  },
  "luminance": 0.06667
}

Semantic roles & 50–950 ramp

primary

#273FA4

secondary

#C2B065

accent

#C643E5

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #273FA4

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

Preview Lab → · Contrast checker → · Palette generator →