#3E40BB#3E40BB

#3E40BB is a mid, vivid blue. Relative luminance 0.083; OKLCH L 45.2% C 0.188 H 275.1°. Best body text is #FFFFFF at 7.91:1 contrast (WCAG AA passes).

Color values

HEX	#3E40BB
RGB	rgb(62, 64, 187)
HSL	hsl(239, 50%, 49%)
HSV	hsv(239, 67%, 73%)
CMYK	cmyk(66.8%, 65.8%, 0%, 26.7%)
CIE-LAB	lab(34.55, 38.29, -64.98)
CIE-LCH	lch(34.55, 75.42, 300.51°)
OKLab	oklab(45.16% 0.0168 -0.1875)
OKLCH	oklch(45.16% 0.188 275.1)
XYZ	xyz(12.7867, 8.2776, 47.9280)
Luminance	0.0828 (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

#3E40BB #BBB93E

analogous

#3E7FBB #3E40BB #7B3EBB

triadic

#3E40BB #BB3E40 #40BB3E

tetradic

#3E40BB #BB3E7F #BBB93E #3EBB7B

square

#3E40BB #BB3E7F #BBB93E #3EBB7B

split-complementary

#3E40BB #BB7B3E #7FBB3E

monochromatic

#20215F #2F308D #3E40BB #696BCD #9798DC

Accessibility & contrast

On white

7.91

#3E40BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3E40BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3E40BB

7.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3E40BB	#FFFFFF	#000000	##FFFFFF
##3E40BB	1.00	7.91	2.66	7.91
#FFFFFF	7.91	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BF

Deuteranopia (green-blind)

#004CB9

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3e40bb;
/* rgb */ color: rgb(62, 64, 187);
/* oklch */ color: oklch(45.2% 0.188 275.1);

Tailwind

colors: {
  custom: {
    50: '#8375d0',
    500: '#3e40bb',
    950: '#000000',
  },
}

SCSS

$custom: #3e40bb;
$custom-light: #8375d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3e40bb",
  "rgb": {
    "r": 62,
    "g": 64,
    "b": 187
  },
  "hsl": {
    "h": 239.04,
    "s": 50.201,
    "l": 48.824
  },
  "oklch": {
    "l": 0.45159,
    "c": 0.18827,
    "h": 275.1
  },
  "luminance": 0.08279
}

Semantic roles & 50–950 ramp

primary

#3E40BB

secondary

#C8C78D

accent

#D74EDA

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3E40BB

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

Preview Lab → · Contrast checker → · Palette generator →