#3F64BD#3F64BD

#3F64BD is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.3% C 0.146 H 264.8°. Best body text is #FFFFFF at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#3F64BD
RGB	rgb(63, 100, 189)
HSL	hsl(222, 50%, 49%)
HSV	hsv(222, 67%, 74%)
CMYK	cmyk(66.7%, 47.1%, 0%, 25.9%)
CIE-LAB	lab(44.01, 16.20, -50.81)
CIE-LCH	lch(44.01, 53.33, 287.69°)
OKLab	oklab(52.29% -0.0131 -0.1455)
OKLCH	oklch(52.29% 0.146 264.8)
XYZ	xyz(15.7892, 13.8437, 49.9743)
Luminance	0.1384 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F64BD #BD983F

analogous

#3FA3BD #3F64BD #593FBD

triadic

#3F64BD #BD3F64 #64BD3F

tetradic

#3F64BD #BD3FA3 #BD983F #3FBD59

square

#3F64BD #BD3FA3 #BD983F #3FBD59

split-complementary

#3F64BD #BD593F #A3BD3F

monochromatic

#203361 #304C8F #3F64BD #6B88CE #99ADDD

Accessibility & contrast

On white

5.57

#3F64BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.77

#3F64BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F64BD

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F64BD	#FFFFFF	#000000	##FFFFFF
##3F64BD	1.00	5.57	3.77	5.57
#FFFFFF	5.57	1.00	21.00	1.00
#000000	3.77	21.00	1.00	21.00
##FFFFFF	5.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#366EC0

Deuteranopia (green-blind)

#1C63BB

Tritanopia (blue-blind)

#007987

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3f64bd;
/* rgb */ color: rgb(63, 100, 189);
/* oklch */ color: oklch(52.3% 0.146 264.8);

Tailwind

colors: {
  custom: {
    50: '#818fd1',
    500: '#3f64bd',
    950: '#000000',
  },
}

SCSS

$custom: #3f64bd;
$custom-light: #818fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f64bd",
  "rgb": {
    "r": 63,
    "g": 100,
    "b": 189
  },
  "hsl": {
    "h": 222.381,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.52292,
    "c": 0.14605,
    "h": 264.8
  },
  "luminance": 0.13845
}

Semantic roles & 50–950 ramp

primary

#3F64BD

secondary

#C9B88F

accent

#B14EDA

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3F64BD

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

Preview Lab → · Contrast checker → · Palette generator →