#3B42BB#3B42BB

#3B42BB is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.3% C 0.187 H 273.6°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#3B42BB
RGB	rgb(59, 66, 187)
HSL	hsl(237, 52%, 48%)
HSV	hsv(237, 68%, 73%)
CMYK	cmyk(68.4%, 64.7%, 0%, 26.7%)
CIE-LAB	lab(34.83, 36.65, -64.53)
CIE-LCH	lch(34.83, 74.22, 299.60°)
OKLab	oklab(45.31% 0.0119 -0.1863)
OKLCH	oklch(45.31% 0.187 273.6)
XYZ	xyz(12.7185, 8.4129, 47.9577)
Luminance	0.0841 (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

#3B42BB #BBB43B

analogous

#3B82BB #3B42BB #743BBB

triadic

#3B42BB #BB3B42 #42BB3B

tetradic

#3B42BB #BB3B82 #BBB43B #3BBB74

square

#3B42BB #BB3B82 #BBB43B #3BBB74

split-complementary

#3B42BB #BB743B #82BB3B

monochromatic

#1E215E #2C328C #3B42BB #656BCE #9397DD

Accessibility & contrast

On white

7.83

#3B42BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#3B42BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3B42BB

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B42BB	#FFFFFF	#000000	##FFFFFF
##3B42BB	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058BF

Deuteranopia (green-blind)

#004CB9

Tritanopia (blue-blind)

#006178

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3b42bb;
/* rgb */ color: rgb(59, 66, 187);
/* oklch */ color: oklch(45.3% 0.187 273.6);

Tailwind

colors: {
  custom: {
    50: '#8176d0',
    500: '#3b42bb',
    950: '#000000',
  },
}

SCSS

$custom: #3b42bb;
$custom-light: #8176d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3b42bb",
  "rgb": {
    "r": 59,
    "g": 66,
    "b": 187
  },
  "hsl": {
    "h": 236.719,
    "s": 52.033,
    "l": 48.235
  },
  "oklch": {
    "l": 0.45308,
    "c": 0.18668,
    "h": 273.6
  },
  "luminance": 0.08414
}

Semantic roles & 50–950 ramp

primary

#3B42BB

secondary

#C8C58A

accent

#D44CDB

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3B42BB

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

Preview Lab → · Contrast checker → · Palette generator →