#3F64BC#3F64BC

#3F64BC is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.2% C 0.145 H 264.7°. Best body text is #FFFFFF at 5.58:1 contrast (WCAG AA passes).

Color values

HEX	#3F64BC
RGB	rgb(63, 100, 188)
HSL	hsl(222, 50%, 49%)
HSV	hsv(222, 66%, 74%)
CMYK	cmyk(66.5%, 46.8%, 0%, 26.3%)
CIE-LAB	lab(43.95, 15.85, -50.33)
CIE-LCH	lch(43.95, 52.77, 287.47°)
OKLab	oklab(52.22% -0.0133 -0.144)
OKLCH	oklch(52.22% 0.145 264.7)
XYZ	xyz(15.6810, 13.8004, 49.4046)
Luminance	0.1380 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F64BC #BC973F

analogous

#3FA3BC #3F64BC #593FBC

triadic

#3F64BC #BC3F64 #64BC3F

tetradic

#3F64BC #BC3FA3 #BC973F #3FBC59

square

#3F64BC #BC3FA3 #BC973F #3FBC59

split-complementary

#3F64BC #BC593F #A3BC3F

monochromatic

#203360 #304C8E #3F64BC #6B88CD #99ADDD

Accessibility & contrast

On white

5.58

#3F64BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#3F64BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F64BC

5.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F64BC	#FFFFFF	#000000	##FFFFFF
##3F64BC	1.00	5.58	3.76	5.58
#FFFFFF	5.58	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#376EBF

Deuteranopia (green-blind)

#1E63BA

Tritanopia (blue-blind)

#007887

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3f64bc;
/* rgb */ color: rgb(63, 100, 188);
/* oklch */ color: oklch(52.2% 0.145 264.7);

Tailwind

colors: {
  custom: {
    50: '#818fd1',
    500: '#3f64bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f64bc;
$custom-light: #818fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f64bc",
  "rgb": {
    "r": 63,
    "g": 100,
    "b": 188
  },
  "hsl": {
    "h": 222.24,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.52224,
    "c": 0.14465,
    "h": 264.7
  },
  "luminance": 0.13802
}

Semantic roles & 50–950 ramp

primary

#3F64BC

secondary

#C9B78E

accent

#B04ED9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3F64BC

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

Preview Lab → · Contrast checker → · Palette generator →