#3143AF#3143AF

#3143AF is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.8% C 0.172 H 270.3°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#3143AF
RGB	rgb(49, 67, 175)
HSL	hsl(231, 56%, 44%)
HSV	hsv(231, 72%, 69%)
CMYK	cmyk(72%, 61.7%, 0%, 31.4%)
CIE-LAB	lab(33.48, 30.45, -59.66)
CIE-LCH	lch(33.48, 66.98, 297.04°)
OKLab	oklab(43.85% 0.0009 -0.1722)
OKLCH	oklch(43.85% 0.172 270.3)
XYZ	xyz(11.0090, 7.7613, 41.4670)
Luminance	0.0776 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3143AF #AF9D31

analogous

#3182AF #3143AF #5E31AF

triadic

#3143AF #AF3143 #43AF31

tetradic

#3143AF #AF3182 #AF9D31 #31AF5E

square

#3143AF #AF3182 #AF9D31 #31AF5E

split-complementary

#3143AF #AF5E31 #82AF31

monochromatic

#161E4F #24317F #3143AF #4F61CE #7F8CDB

Accessibility & contrast

On white

8.23

#3143AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#3143AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3143AF

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3143AF	#FFFFFF	#000000	##FFFFFF
##3143AF	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B3

Deuteranopia (green-blind)

#0049AD

Tritanopia (blue-blind)

#005E72

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3143af;
/* rgb */ color: rgb(49, 67, 175);
/* oklch */ color: oklch(43.8% 0.172 270.3);

Tailwind

colors: {
  custom: {
    50: '#7b77c8',
    500: '#3143af',
    950: '#000000',
  },
}

SCSS

$custom: #3143af;
$custom-light: #7b77c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3143af",
  "rgb": {
    "r": 49,
    "g": 67,
    "b": 175
  },
  "hsl": {
    "h": 231.429,
    "s": 56.25,
    "l": 43.922
  },
  "oklch": {
    "l": 0.43849,
    "c": 0.17223,
    "h": 270.3
  },
  "luminance": 0.07762
}

Semantic roles & 50–950 ramp

primary

#3143AF

secondary

#C4B978

accent

#CA48E0

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3143AF

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

Preview Lab → · Contrast checker → · Palette generator →