#273FA5#273FA5

#273FA5 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.7% C 0.166 H 268.0°. Best body text is #FFFFFF at 8.97:1 contrast (WCAG AA passes).

Color values

HEX	#273FA5
RGB	rgb(39, 63, 165)
HSL	hsl(229, 62%, 40%)
HSV	hsv(229, 76%, 65%)
CMYK	cmyk(76.4%, 61.8%, 0%, 35.3%)
CIE-LAB	lab(31.12, 28.16, -57.55)
CIE-LCH	lch(31.12, 64.07, 296.07°)
OKLab	oklab(41.7% -0.0057 -0.1663)
OKLCH	oklch(41.7% 0.166 268)
XYZ	xyz(9.4034, 6.7019, 36.3880)
Luminance	0.0670 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#273FA5 #A58D27

analogous

#277EA5 #273FA5 #4E27A5

triadic

#273FA5 #A5273F #3FA527

tetradic

#273FA5 #A5277E #A58D27 #27A54E

square

#273FA5 #A5277E #A58D27 #27A54E

split-complementary

#273FA5 #A54E27 #7EA527

monochromatic

#101942 #1B2C74 #273FA5 #3956D0 #6A80DC

Accessibility & contrast

On white

8.97

#273FA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#273FA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #273FA5

8.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##273FA5	#FFFFFF	#000000	##FFFFFF
##273FA5	1.00	8.97	2.34	8.97
#FFFFFF	8.97	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA8

Deuteranopia (green-blind)

#0043A3

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #273fa5;
/* rgb */ color: rgb(39, 63, 165);
/* oklch */ color: oklch(41.7% 0.166 268.0);

Tailwind

colors: {
  custom: {
    50: '#7573c1',
    500: '#273fa5',
    950: '#000000',
  },
}

SCSS

$custom: #273fa5;
$custom-light: #7573c1;
$custom-dark: #000000;

JSON

{
  "hex": "#273fa5",
  "rgb": {
    "r": 39,
    "g": 63,
    "b": 165
  },
  "hsl": {
    "h": 228.571,
    "s": 61.765,
    "l": 40
  },
  "oklch": {
    "l": 0.41703,
    "c": 0.16641,
    "h": 268
  },
  "luminance": 0.06703
}

Semantic roles & 50–950 ramp

primary

#273FA5

secondary

#C2B166

accent

#C643E5

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #273FA5

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

Preview Lab → · Contrast checker → · Palette generator →