#3143B3#3143B3

#3143B3 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.2% C 0.178 H 270.3°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#3143B3
RGB	rgb(49, 67, 179)
HSL	hsl(232, 57%, 45%)
HSV	hsv(232, 73%, 70%)
CMYK	cmyk(72.6%, 62.6%, 0%, 29.8%)
CIE-LAB	lab(33.82, 31.91, -61.48)
CIE-LCH	lch(33.82, 69.27, 297.43°)
OKLab	oklab(44.2% 0.0008 -0.1776)
OKLCH	oklch(44.2% 0.178 270.3)
XYZ	xyz(11.4077, 7.9208, 43.5667)
Luminance	0.0792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3143B3 #B3A131

analogous

#3184B3 #3143B3 #6031B3

triadic

#3143B3 #B33143 #43B331

tetradic

#3143B3 #B33184 #B3A131 #31B360

square

#3143B3 #B33184 #B3A131 #31B360

split-complementary

#3143B3 #B36031 #84B331

monochromatic

#171F53 #243183 #3143B3 #5263D0 #828EDD

Accessibility & contrast

On white

8.13

#3143B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3143B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3143B3

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3143B3	#FFFFFF	#000000	##FFFFFF
##3143B3	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B7

Deuteranopia (green-blind)

#004AB1

Tritanopia (blue-blind)

#006074

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3143b3;
/* rgb */ color: rgb(49, 67, 179);
/* oklch */ color: oklch(44.2% 0.178 270.3);

Tailwind

colors: {
  custom: {
    50: '#7b77cb',
    500: '#3143b3',
    950: '#000000',
  },
}

SCSS

$custom: #3143b3;
$custom-light: #7b77cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3143b3",
  "rgb": {
    "r": 49,
    "g": 67,
    "b": 179
  },
  "hsl": {
    "h": 231.692,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.44202,
    "c": 0.17758,
    "h": 270.3
  },
  "luminance": 0.07922
}

Semantic roles & 50–950 ramp

primary

#3143B3

secondary

#C6BB7A

accent

#CB48E0

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3143B3

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

Preview Lab → · Contrast checker → · Palette generator →