#3F64CB#3F64CB

#3F64CB is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.3% C 0.165 H 266.1°. Best body text is #FFFFFF at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#3F64CB
RGB	rgb(63, 100, 203)
HSL	hsl(224, 57%, 52%)
HSV	hsv(224, 69%, 80%)
CMYK	cmyk(69%, 50.7%, 0%, 20.4%)
CIE-LAB	lab(44.92, 21.25, -57.44)
CIE-LCH	lch(44.92, 61.24, 290.30°)
OKLab	oklab(53.27% -0.0114 -0.165)
OKLCH	oklch(53.27% 0.165 266.1)
XYZ	xyz(17.3828, 14.4812, 58.3674)
Luminance	0.1448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F64CB #CBA63F

analogous

#3FAACB #3F64CB #603FCB

triadic

#3F64CB #CB3F64 #64CB3F

tetradic

#3F64CB #CB3FAA #CBA63F #3FCB60

square

#3F64CB #CB3FAA #CBA63F #3FCB60

split-complementary

#3F64CB #CB603F #AACB3F

monochromatic

#1F3471 #2C4BA1 #3F64CB #6F8BD8 #9FB2E5

Accessibility & contrast

On white

5.39

#3F64CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.90

#3F64CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F64CB

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F64CB	#FFFFFF	#000000	##FFFFFF
##3F64CB	1.00	5.39	3.90	5.39
#FFFFFF	5.39	1.00	21.00	1.00
#000000	3.90	21.00	1.00	21.00
##FFFFFF	5.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2671CF

Deuteranopia (green-blind)

#0064C9

Tritanopia (blue-blind)

#007C8E

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3f64cb;
/* rgb */ color: rgb(63, 100, 203);
/* oklch */ color: oklch(53.3% 0.165 266.1);

Tailwind

colors: {
  custom: {
    50: '#848fdb',
    500: '#3f64cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f64cb;
$custom-light: #848fdb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f64cb",
  "rgb": {
    "r": 63,
    "g": 100,
    "b": 203
  },
  "hsl": {
    "h": 224.143,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.53275,
    "c": 0.16535,
    "h": 266.1
  },
  "luminance": 0.14483
}

Semantic roles & 50–950 ramp

primary

#3F64CB

secondary

#D1C194

accent

#B847E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F64CB

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

Preview Lab → · Contrast checker → · Palette generator →