#3F4ECB#3F4ECB

#3F4ECB is a mid, vivid blue. Relative luminance 0.108; OKLCH L 49.0% C 0.192 H 271.9°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F4ECB
RGB	rgb(63, 78, 203)
HSL	hsl(234, 57%, 52%)
HSV	hsv(234, 69%, 80%)
CMYK	cmyk(69%, 61.6%, 0%, 20.4%)
CIE-LAB	lab(39.27, 35.24, -66.61)
CIE-LCH	lch(39.27, 75.36, 297.88°)
OKLab	oklab(49.05% 0.0065 -0.1922)
OKLCH	oklch(49.05% 0.192 271.9)
XYZ	xyz(15.5501, 10.8158, 57.7565)
Luminance	0.1082 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.07

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4ECB #CBBC3F

analogous

#3F94CB #3F4ECB #763FCB

triadic

#3F4ECB #CB3F4E #4ECB3F

tetradic

#3F4ECB #CB3F94 #CBBC3F #3FCB76

square

#3F4ECB #CB3F94 #CBBC3F #3FCB76

split-complementary

#3F4ECB #CB763F #94CB3F

monochromatic

#1F2771 #2C38A1 #3F4ECB #6F7AD8 #9FA7E5

Accessibility & contrast

On white

6.64

#3F4ECB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#3F4ECB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4ECB

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4ECB	#FFFFFF	#000000	##FFFFFF
##3F4ECB	1.00	6.64	3.16	6.64
#FFFFFF	6.64	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063CF

Deuteranopia (green-blind)

#0056C9

Tritanopia (blue-blind)

#006E85

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3f4ecb;
/* rgb */ color: rgb(63, 78, 203);
/* oklch */ color: oklch(49.0% 0.192 271.9);

Tailwind

colors: {
  custom: {
    50: '#867fdc',
    500: '#3f4ecb',
    950: '#000000',
  },
}

SCSS

$custom: #3f4ecb;
$custom-light: #867fdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4ecb",
  "rgb": {
    "r": 63,
    "g": 78,
    "b": 203
  },
  "hsl": {
    "h": 233.571,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.49045,
    "c": 0.1923,
    "h": 271.9
  },
  "luminance": 0.10817
}

Semantic roles & 50–950 ramp

primary

#3F4ECB

secondary

#D1CB94

accent

#D047E1

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0A15

muted

#7D7C83

Preview Lab

Preview with #3F4ECB

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

Preview Lab → · Contrast checker → · Palette generator →