#3F63BA#3F63BA

#3F63BA is a mid, vivid blue. Relative luminance 0.135; OKLCH L 51.9% C 0.143 H 264.9°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#3F63BA
RGB	rgb(63, 99, 186)
HSL	hsl(222, 49%, 49%)
HSV	hsv(222, 66%, 73%)
CMYK	cmyk(66.1%, 46.8%, 0%, 27.1%)
CIE-LAB	lab(43.54, 15.76, -49.81)
CIE-LCH	lch(43.54, 52.25, 287.56°)
OKLab	oklab(51.88% -0.0126 -0.1425)
OKLCH	oklch(51.88% 0.143 264.9)
XYZ	xyz(15.3716, 13.5242, 48.2452)
Luminance	0.1353 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63BA #BA963F

analogous

#3FA1BA #3F63BA #593FBA

triadic

#3F63BA #BA3F63 #63BA3F

tetradic

#3F63BA #BA3FA1 #BA963F #3FBA59

square

#3F63BA #BA3FA1 #BA963F #3FBA59

split-complementary

#3F63BA #BA593F #A1BA3F

monochromatic

#20325F #304B8C #3F63BA #6A87CC #97ACDC

Accessibility & contrast

On white

5.67

#3F63BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#3F63BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63BA

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63BA	#FFFFFF	#000000	##FFFFFF
##3F63BA	1.00	5.67	3.71	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#376DBD

Deuteranopia (green-blind)

#1F62B8

Tritanopia (blue-blind)

#007785

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3f63ba;
/* rgb */ color: rgb(63, 99, 186);
/* oklch */ color: oklch(51.9% 0.143 264.9);

Tailwind

colors: {
  custom: {
    50: '#818ecf',
    500: '#3f63ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f63ba;
$custom-light: #818ecf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63ba",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 186
  },
  "hsl": {
    "h": 222.439,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.51876,
    "c": 0.1431,
    "h": 264.9
  },
  "luminance": 0.13526
}

Semantic roles & 50–950 ramp

primary

#3F63BA

secondary

#C8B78D

accent

#B14FD9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3F63BA

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

Preview Lab → · Contrast checker → · Palette generator →