#3B40CB#3B40CB

#3B40CB is a mid, highly saturated blue. Relative luminance 0.089; OKLCH L 46.5% C 0.209 H 273.2°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#3B40CB
RGB	rgb(59, 64, 203)
HSL	hsl(238, 58%, 51%)
HSV	hsv(238, 71%, 80%)
CMYK	cmyk(70.9%, 68.5%, 0%, 20.4%)
CIE-LAB	lab(35.80, 43.33, -72.29)
CIE-LCH	lch(35.80, 84.28, 300.94°)
OKLab	oklab(46.46% 0.0116 -0.209)
OKLCH	oklch(46.46% 0.209 273.2)
XYZ	xyz(14.4129, 8.9070, 57.4480)
Luminance	0.0891 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 2.58

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B40CB #CBC63B

analogous

#3B88CB #3B40CB #7E3BCB

triadic

#3B40CB #CB3B40 #40CB3B

tetradic

#3B40CB #CB3B88 #CBC63B #3BCB7E

square

#3B40CB #CB3B88 #CBC63B #3BCB7E

split-complementary

#3B40CB #CB7E3B #88CB3B

monochromatic

#1D206E #2A2E9F #3B40CB #6B6FD8 #9C9EE5

Accessibility & contrast

On white

7.55

#3B40CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#3B40CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3B40CB

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B40CB	#FFFFFF	#000000	##FFFFFF
##3B40CB	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BCF

Deuteranopia (green-blind)

#004DC8

Tritanopia (blue-blind)

#006680

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3b40cb;
/* rgb */ color: rgb(59, 64, 203);
/* oklch */ color: oklch(46.5% 0.209 273.2);

Tailwind

colors: {
  custom: {
    50: '#8575dc',
    500: '#3b40cb',
    950: '#000000',
  },
}

SCSS

$custom: #3b40cb;
$custom-light: #8575dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3b40cb",
  "rgb": {
    "r": 59,
    "g": 64,
    "b": 203
  },
  "hsl": {
    "h": 237.917,
    "s": 58.065,
    "l": 51.373
  },
  "oklch": {
    "l": 0.46455,
    "c": 0.20932,
    "h": 273.2
  },
  "luminance": 0.08908
}

Semantic roles & 50–950 ramp

primary

#3B40CB

secondary

#D1CE91

accent

#DC47E1

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0D0815

muted

#7D7B83

Preview Lab

Preview with #3B40CB

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

Preview Lab → · Contrast checker → · Palette generator →