#3F63DD#3F63DD

#3F63DD is a mid, vivid blue. Relative luminance 0.152; OKLCH L 54.4% C 0.191 H 267.3°. Best body text is #FFFFFF at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#3F63DD
RGB	rgb(63, 99, 221)
HSL	hsl(226, 70%, 56%)
HSV	hsv(226, 71%, 87%)
CMYK	cmyk(71.5%, 55.2%, 0%, 13.3%)
CIE-LAB	lab(45.91, 28.36, -66.12)
CIE-LCH	lch(45.91, 71.95, 293.21°)
OKLab	oklab(54.42% -0.0091 -0.1905)
OKLCH	oklch(54.42% 0.191 267.3)
XYZ	xyz(19.5583, 15.1989, 70.2955)
Luminance	0.1520 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63DD #DDB93F

analogous

#3FB2DD #3F63DD #6A3FDD

triadic

#3F63DD #DD3F63 #63DD3F

tetradic

#3F63DD #DD3FB2 #DDB93F #3FDD6A

square

#3F63DD #DD3FB2 #DDB93F #3FDD6A

split-complementary

#3F63DD #DD6A3F #B2DD3F

monochromatic

#183289 #2245BD #3F63DD #738DE6 #A7B7EF

Accessibility & contrast

On white

5.20

#3F63DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.04

#3F63DD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63DD

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63DD	#FFFFFF	#000000	##FFFFFF
##3F63DD	1.00	5.20	4.04	5.20
#FFFFFF	5.20	1.00	21.00	1.00
#000000	4.04	21.00	1.00	21.00
##FFFFFF	5.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0074E1

Deuteranopia (green-blind)

#0066DB

Tritanopia (blue-blind)

#008196

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3f63dd;
/* rgb */ color: rgb(63, 99, 221);
/* oklch */ color: oklch(54.4% 0.191 267.3);

Tailwind

colors: {
  custom: {
    50: '#888ee8',
    500: '#3f63dd',
    950: '#000000',
  },
}

SCSS

$custom: #3f63dd;
$custom-light: #888ee8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63dd",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 221
  },
  "hsl": {
    "h": 226.329,
    "s": 69.912,
    "l": 55.686
  },
  "oklch": {
    "l": 0.54421,
    "c": 0.19074,
    "h": 267.3
  },
  "luminance": 0.15201
}

Semantic roles & 50–950 ramp

primary

#3F63DD

secondary

#DDCE9B

accent

#C43BED

background

#F9F8FE

surface

#F1F0FD

border

#CBCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #3F63DD

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

Preview Lab → · Contrast checker → · Palette generator →