#3F63AB#3F63AB

#3F63AB is a mid, vivid blue. Relative luminance 0.129; OKLCH L 50.9% C 0.122 H 262.8°. Best body text is #FFFFFF at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#3F63AB
RGB	rgb(63, 99, 171)
HSL	hsl(220, 46%, 46%)
HSV	hsv(220, 63%, 67%)
CMYK	cmyk(63.2%, 42.1%, 0%, 32.9%)
CIE-LAB	lab(42.64, 10.41, -42.47)
CIE-LCH	lch(42.64, 43.73, 283.77°)
OKLab	oklab(50.89% -0.0153 -0.121)
OKLCH	oklch(50.89% 0.122 262.8)
XYZ	xyz(13.8599, 12.9195, 40.2835)
Luminance	0.1292 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63AB #AB873F

analogous

#3F99AB #3F63AB #513FAB

triadic

#3F63AB #AB3F63 #63AB3F

tetradic

#3F63AB #AB3F99 #AB873F #3FAB51

square

#3F63AB #AB3F99 #AB873F #3FAB51

split-complementary

#3F63AB #AB513F #99AB3F

monochromatic

#1E2F52 #2F497E #3F63AB #6283C5 #8FA6D6

Accessibility & contrast

On white

5.86

#3F63AB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#3F63AB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63AB

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63AB	#FFFFFF	#000000	##FFFFFF
##3F63AB	1.00	5.86	3.58	5.86
#FFFFFF	5.86	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#436AAE

Deuteranopia (green-blind)

#3360A9

Tritanopia (blue-blind)

#00737E

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3f63ab;
/* rgb */ color: rgb(63, 99, 171);
/* oklch */ color: oklch(50.9% 0.122 262.8);

Tailwind

colors: {
  custom: {
    50: '#7e8fc4',
    500: '#3f63ab',
    950: '#000000',
  },
}

SCSS

$custom: #3f63ab;
$custom-light: #7e8fc4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63ab",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 171
  },
  "hsl": {
    "h": 220,
    "s": 46.154,
    "l": 45.882
  },
  "oklch": {
    "l": 0.50892,
    "c": 0.12193,
    "h": 262.8
  },
  "luminance": 0.12921
}

Semantic roles & 50–950 ramp

primary

#3F63AB

secondary

#C1AD85

accent

#AA52D6

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3F63AB

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

Preview Lab → · Contrast checker → · Palette generator →