#2743B3#2743B3

#2743B3 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.7% C 0.180 H 267.3°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#2743B3
RGB	rgb(39, 67, 179)
HSL	hsl(228, 64%, 43%)
HSV	hsv(228, 78%, 70%)
CMYK	cmyk(78.2%, 62.6%, 0%, 29.8%)
CIE-LAB	lab(33.35, 30.79, -62.27)
CIE-LCH	lch(33.35, 69.47, 296.31°)
OKLab	oklab(43.73% -0.0084 -0.1801)
OKLCH	oklch(43.73% 0.18 267.3)
XYZ	xyz(10.9777, 7.6991, 43.5466)
Luminance	0.0770 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2743B3 #B39727

analogous

#2789B3 #2743B3 #5127B3

triadic

#2743B3 #B32743 #43B327

tetradic

#2743B3 #B32789 #B39727 #27B351

square

#2743B3 #B32789 #B39727 #27B351

split-complementary

#2743B3 #B35127 #89B327

monochromatic

#111D4E #1C3081 #2743B3 #415FD6 #748AE1

Accessibility & contrast

On white

8.27

#2743B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#2743B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2743B3

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2743B3	#FFFFFF	#000000	##FFFFFF
##2743B3	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#006074

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #2743b3;
/* rgb */ color: rgb(39, 67, 179);
/* oklch */ color: oklch(43.7% 0.180 267.3);

Tailwind

colors: {
  custom: {
    50: '#7876cb',
    500: '#2743b3',
    950: '#000000',
  },
}

SCSS

$custom: #2743b3;
$custom-light: #7876cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2743b3",
  "rgb": {
    "r": 39,
    "g": 67,
    "b": 179
  },
  "hsl": {
    "h": 228,
    "s": 64.22,
    "l": 42.745
  },
  "oklch": {
    "l": 0.43727,
    "c": 0.18029,
    "h": 267.3
  },
  "luminance": 0.077
}

Semantic roles & 50–950 ramp

primary

#2743B3

secondary

#C8B66E

accent

#C641E7

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2743B3

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

Preview Lab → · Contrast checker → · Palette generator →