#3F63DB#3F63DB

#3F63DB is a mid, vivid blue. Relative luminance 0.151; OKLCH L 54.3% C 0.188 H 267.2°. Best body text is #FFFFFF at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#3F63DB
RGB	rgb(63, 99, 219)
HSL	hsl(226, 68%, 55%)
HSV	hsv(226, 71%, 86%)
CMYK	cmyk(71.2%, 54.8%, 0%, 14.1%)
CIE-LAB	lab(45.76, 27.64, -65.22)
CIE-LCH	lch(45.76, 70.84, 292.97°)
OKLab	oklab(54.27% -0.0092 -0.1879)
OKLCH	oklch(54.27% 0.188 267.2)
XYZ	xyz(19.2935, 15.0929, 68.9005)
Luminance	0.1510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63DB #DBB73F

analogous

#3FB1DB #3F63DB #693FDB

triadic

#3F63DB #DB3F63 #63DB3F

tetradic

#3F63DB #DB3FB1 #DBB73F #3FDB69

square

#3F63DB #DB3FB1 #DBB73F #3FDB69

split-complementary

#3F63DB #DB693F #B1DB3F

monochromatic

#193286 #2346BA #3F63DB #738DE5 #A6B7EE

Accessibility & contrast

On white

5.23

#3F63DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.02

#3F63DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63DB

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63DB	#FFFFFF	#000000	##FFFFFF
##3F63DB	1.00	5.23	4.02	5.23
#FFFFFF	5.23	1.00	21.00	1.00
#000000	4.02	21.00	1.00	21.00
##FFFFFF	5.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0074DF

Deuteranopia (green-blind)

#0065D9

Tritanopia (blue-blind)

#008095

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3f63db;
/* rgb */ color: rgb(63, 99, 219);
/* oklch */ color: oklch(54.3% 0.188 267.2);

Tailwind

colors: {
  custom: {
    50: '#878ee7',
    500: '#3f63db',
    950: '#000000',
  },
}

SCSS

$custom: #3f63db;
$custom-light: #878ee7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63db",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 219
  },
  "hsl": {
    "h": 226.154,
    "s": 68.421,
    "l": 55.294
  },
  "oklch": {
    "l": 0.54267,
    "c": 0.18809,
    "h": 267.2
  },
  "luminance": 0.15095
}

Semantic roles & 50–950 ramp

primary

#3F63DB

secondary

#DCCC9A

accent

#C33DEB

background

#F9F8FE

surface

#F1F0FD

border

#CBCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #3F63DB

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

Preview Lab → · Contrast checker → · Palette generator →