#3B40BB#3B40BB

#3B40BB is a dark, vivid blue. Relative luminance 0.082; OKLCH L 45.0% C 0.189 H 274.0°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#3B40BB
RGB	rgb(59, 64, 187)
HSL	hsl(238, 52%, 48%)
HSV	hsv(238, 68%, 73%)
CMYK	cmyk(68.4%, 65.8%, 0%, 26.7%)
CIE-LAB	lab(34.36, 37.89, -65.30)
CIE-LCH	lch(34.36, 75.50, 300.13°)
OKLab	oklab(44.97% 0.0133 -0.1885)
OKLCH	oklch(44.97% 0.189 274)
XYZ	xyz(12.6037, 8.1833, 47.9194)
Luminance	0.0818 (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

#3B40BB #BBB63B

analogous

#3B80BB #3B40BB #763BBB

triadic

#3B40BB #BB3B40 #40BB3B

tetradic

#3B40BB #BB3B80 #BBB63B #3BBB76

square

#3B40BB #BB3B80 #BBB63B #3BBB76

split-complementary

#3B40BB #BB763B #80BB3B

monochromatic

#1E205E #2C308C #3B40BB #6569CE #9396DD

Accessibility & contrast

On white

7.96

#3B40BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#3B40BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3B40BB

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B40BB	#FFFFFF	#000000	##FFFFFF
##3B40BB	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BF

Deuteranopia (green-blind)

#004BB9

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3b40bb;
/* rgb */ color: rgb(59, 64, 187);
/* oklch */ color: oklch(45.0% 0.189 274.0);

Tailwind

colors: {
  custom: {
    50: '#8275d0',
    500: '#3b40bb',
    950: '#000000',
  },
}

SCSS

$custom: #3b40bb;
$custom-light: #8275d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3b40bb",
  "rgb": {
    "r": 59,
    "g": 64,
    "b": 187
  },
  "hsl": {
    "h": 237.656,
    "s": 52.033,
    "l": 48.235
  },
  "oklch": {
    "l": 0.44968,
    "c": 0.18902,
    "h": 274
  },
  "luminance": 0.08184
}

Semantic roles & 50–950 ramp

primary

#3B40BB

secondary

#C8C68A

accent

#D64CDB

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3B40BB

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

Preview Lab → · Contrast checker → · Palette generator →