#3F4BCB#3F4BCB

#3F4BCB is a mid, vivid blue. Relative luminance 0.104; OKLCH L 48.5% C 0.196 H 272.6°. Best body text is #FFFFFF at 6.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F4BCB
RGB	rgb(63, 75, 203)
HSL	hsl(235, 57%, 52%)
HSV	hsv(235, 69%, 80%)
CMYK	cmyk(69%, 63.1%, 0%, 20.4%)
CIE-LAB	lab(38.55, 37.11, -67.78)
CIE-LCH	lch(38.55, 77.28, 298.70°)
OKLab	oklab(48.52% 0.0087 -0.1957)
OKLCH	oklch(48.52% 0.196 272.6)
XYZ	xyz(15.3418, 10.3992, 57.6871)
Luminance	0.1040 (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

#3F4BCB #CBBF3F

analogous

#3F91CB #3F4BCB #793FCB

triadic

#3F4BCB #CB3F4B #4BCB3F

tetradic

#3F4BCB #CB3F91 #CBBF3F #3FCB79

square

#3F4BCB #CB3F91 #CBBF3F #3FCB79

split-complementary

#3F4BCB #CB793F #91CB3F

monochromatic

#1F2671 #2C36A1 #3F4BCB #6F78D8 #9FA5E5

Accessibility & contrast

On white

6.82

#3F4BCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#3F4BCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4BCB

6.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4BCB	#FFFFFF	#000000	##FFFFFF
##3F4BCB	1.00	6.82	3.08	6.82
#FFFFFF	6.82	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061CF

Deuteranopia (green-blind)

#0054C9

Tritanopia (blue-blind)

#006C84

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f4bcb;
/* rgb */ color: rgb(63, 75, 203);
/* oklch */ color: oklch(48.5% 0.196 272.6);

Tailwind

colors: {
  custom: {
    50: '#867ddc',
    500: '#3f4bcb',
    950: '#000000',
  },
}

SCSS

$custom: #3f4bcb;
$custom-light: #867ddc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4bcb",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 203
  },
  "hsl": {
    "h": 234.857,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.48516,
    "c": 0.19585,
    "h": 272.6
  },
  "luminance": 0.10401
}

Semantic roles & 50–950 ramp

primary

#3F4BCB

secondary

#D1CC94

accent

#D347E1

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0915

muted

#7D7B83

Preview Lab

Preview with #3F4BCB

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

Preview Lab → · Contrast checker → · Palette generator →