#3F63CE#3F63CE

#3F63CE is a mid, vivid blue. Relative luminance 0.144; OKLCH L 53.3% C 0.171 H 266.6°. Best body text is #FFFFFF at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#3F63CE
RGB	rgb(63, 99, 206)
HSL	hsl(225, 59%, 53%)
HSV	hsv(225, 69%, 81%)
CMYK	cmyk(69.4%, 51.9%, 0%, 19.2%)
CIE-LAB	lab(44.85, 22.96, -59.27)
CIE-LCH	lch(44.85, 63.56, 291.18°)
OKLab	oklab(53.29% -0.0102 -0.1704)
OKLCH	oklch(53.29% 0.171 266.6)
XYZ	xyz(17.6484, 14.4349, 60.2367)
Luminance	0.1444 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63CE #CEAA3F

analogous

#3FABCE #3F63CE #623FCE

triadic

#3F63CE #CE3F63 #63CE3F

tetradic

#3F63CE #CE3FAB #CEAA3F #3FCE62

square

#3F63CE #CE3FAB #CEAA3F #3FCE62

split-complementary

#3F63CE #CE623F #ABCE3F

monochromatic

#1E3475 #2A49A6 #3F63CE #708BDA #A1B2E7

Accessibility & contrast

On white

5.40

#3F63CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#3F63CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63CE

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63CE	#FFFFFF	#000000	##FFFFFF
##3F63CE	1.00	5.40	3.89	5.40
#FFFFFF	5.40	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D71D2

Deuteranopia (green-blind)

#0064CC

Tritanopia (blue-blind)

#007D8F

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3f63ce;
/* rgb */ color: rgb(63, 99, 206);
/* oklch */ color: oklch(53.3% 0.171 266.6);

Tailwind

colors: {
  custom: {
    50: '#858ede',
    500: '#3f63ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f63ce;
$custom-light: #858ede;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63ce",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 206
  },
  "hsl": {
    "h": 224.895,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.5329,
    "c": 0.17067,
    "h": 266.6
  },
  "luminance": 0.14437
}

Semantic roles & 50–950 ramp

primary

#3F63CE

secondary

#D3C495

accent

#BB45E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F63CE

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

Preview Lab → · Contrast checker → · Palette generator →