#273FA3#273FA3

#273FA3 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.5% C 0.164 H 268.0°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#273FA3
RGB	rgb(39, 63, 163)
HSL	hsl(228, 61%, 40%)
HSV	hsv(228, 76%, 64%)
CMYK	cmyk(76.1%, 61.3%, 0%, 36.1%)
CIE-LAB	lab(30.95, 27.40, -56.63)
CIE-LCH	lch(30.95, 62.91, 295.82°)
OKLab	oklab(41.52% -0.0057 -0.1636)
OKLCH	oklch(41.52% 0.164 268)
XYZ	xyz(9.2228, 6.6297, 35.4368)
Luminance	0.0663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273FA3 #A38B27

analogous

#277DA3 #273FA3 #4D27A3

triadic

#273FA3 #A3273F #3FA327

tetradic

#273FA3 #A3277D #A38B27 #27A34D

square

#273FA3 #A3277D #A38B27 #27A34D

split-complementary

#273FA3 #A34D27 #7DA327

monochromatic

#0F1940 #1B2C72 #273FA3 #3855CF #697FDB

Accessibility & contrast

On white

9.03

#273FA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#273FA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273FA3

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273FA3	#FFFFFF	#000000	##FFFFFF
##273FA3	1.00	9.03	2.33	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA6

Deuteranopia (green-blind)

#0043A1

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #273fa3;
/* rgb */ color: rgb(39, 63, 163);
/* oklch */ color: oklch(41.5% 0.164 268.0);

Tailwind

colors: {
  custom: {
    50: '#7473bf',
    500: '#273fa3',
    950: '#000000',
  },
}

SCSS

$custom: #273fa3;
$custom-light: #7473bf;
$custom-dark: #000000;

JSON

{
  "hex": "#273fa3",
  "rgb": {
    "r": 39,
    "g": 63,
    "b": 163
  },
  "hsl": {
    "h": 228.387,
    "s": 61.386,
    "l": 39.608
  },
  "oklch": {
    "l": 0.41524,
    "c": 0.16369,
    "h": 268
  },
  "luminance": 0.06631
}

Semantic roles & 50–950 ramp

primary

#273FA3

secondary

#C1AF64

accent

#C543E4

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #273FA3

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

Preview Lab → · Contrast checker → · Palette generator →