#4143BB#4143BB

#4143BB is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.9% C 0.184 H 275.6°. Best body text is #FFFFFF at 7.65:1 contrast (WCAG AA passes).

Color values

HEX	#4143BB
RGB	rgb(65, 67, 187)
HSL	hsl(239, 48%, 49%)
HSV	hsv(239, 65%, 73%)
CMYK	cmyk(65.2%, 64.2%, 0%, 26.7%)
CIE-LAB	lab(35.45, 36.86, -63.50)
CIE-LCH	lch(35.45, 73.43, 300.13°)
OKLab	oklab(45.86% 0.0181 -0.1831)
OKLCH	oklch(45.86% 0.184 275.6)
XYZ	xyz(13.1538, 8.7249, 47.9950)
Luminance	0.0873 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4143BB #BBB941

analogous

#4180BB #4143BB #7C41BB

triadic

#4143BB #BB4143 #43BB41

tetradic

#4143BB #BB4180 #BBB941 #41BB7C

square

#4143BB #BB4180 #BBB941 #41BB7C

split-complementary

#4143BB #BB7C41 #80BB41

monochromatic

#212260 #31338E #4143BB #6D6FCC #9A9BDC

Accessibility & contrast

On white

7.65

#4143BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#4143BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4143BB

7.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4143BB	#FFFFFF	#000000	##FFFFFF
##4143BB	1.00	7.65	2.75	7.65
#FFFFFF	7.65	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059BF

Deuteranopia (green-blind)

#004EB9

Tritanopia (blue-blind)

#006279

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #4143bb;
/* rgb */ color: rgb(65, 67, 187);
/* oklch */ color: oklch(45.9% 0.184 275.6);

Tailwind

colors: {
  custom: {
    50: '#8477d0',
    500: '#4143bb',
    950: '#000000',
  },
}

SCSS

$custom: #4143bb;
$custom-light: #8477d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4143bb",
  "rgb": {
    "r": 65,
    "g": 67,
    "b": 187
  },
  "hsl": {
    "h": 239.016,
    "s": 48.413,
    "l": 49.412
  },
  "oklch": {
    "l": 0.45863,
    "c": 0.184,
    "h": 275.6
  },
  "luminance": 0.08726
}

Semantic roles & 50–950 ramp

primary

#4143BB

secondary

#C8C790

accent

#D650D8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #4143BB

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

Preview Lab → · Contrast checker → · Palette generator →