#3F64DB#3F64DB

#3F64DB is a mid, vivid blue. Relative luminance 0.153; OKLCH L 54.5% C 0.187 H 266.9°. Best body text is #FFFFFF at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#3F64DB
RGB	rgb(63, 100, 219)
HSL	hsl(226, 68%, 55%)
HSV	hsv(226, 71%, 86%)
CMYK	cmyk(71.2%, 54.3%, 0%, 14.1%)
CIE-LAB	lab(46.02, 27.01, -64.80)
CIE-LCH	lch(46.02, 70.20, 292.62°)
OKLab	oklab(54.46% -0.01 -0.1866)
OKLCH	oklch(54.46% 0.187 266.9)
XYZ	xyz(19.3888, 15.2836, 68.9323)
Luminance	0.1529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F64DB #DBB63F

analogous

#3FB2DB #3F64DB #683FDB

triadic

#3F64DB #DB3F64 #64DB3F

tetradic

#3F64DB #DB3FB2 #DBB63F #3FDB68

square

#3F64DB #DB3FB2 #DBB63F #3FDB68

split-complementary

#3F64DB #DB683F #B2DB3F

monochromatic

#193386 #2347BA #3F64DB #738EE5 #A6B7EE

Accessibility & contrast

On white

5.18

#3F64DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.06

#3F64DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F64DB

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F64DB	#FFFFFF	#000000	##FFFFFF
##3F64DB	1.00	5.18	4.06	5.18
#FFFFFF	5.18	1.00	21.00	1.00
#000000	4.06	21.00	1.00	21.00
##FFFFFF	5.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0074DF

Deuteranopia (green-blind)

#0066D9

Tritanopia (blue-blind)

#008196

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3f64db;
/* rgb */ color: rgb(63, 100, 219);
/* oklch */ color: oklch(54.5% 0.187 266.9);

Tailwind

colors: {
  custom: {
    50: '#878fe7',
    500: '#3f64db',
    950: '#000000',
  },
}

SCSS

$custom: #3f64db;
$custom-light: #878fe7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f64db",
  "rgb": {
    "r": 63,
    "g": 100,
    "b": 219
  },
  "hsl": {
    "h": 225.769,
    "s": 68.421,
    "l": 55.294
  },
  "oklch": {
    "l": 0.54462,
    "c": 0.18688,
    "h": 266.9
  },
  "luminance": 0.15286
}

Semantic roles & 50–950 ramp

primary

#3F64DB

secondary

#DCCC9A

accent

#C23DEB

background

#F9F8FE

surface

#F1F0FD

border

#CBCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #3F64DB

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

Preview Lab → · Contrast checker → · Palette generator →