#3F63BE#3F63BE

#3F63BE is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.1% C 0.149 H 265.3°. Best body text is #FFFFFF at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F63BE
RGB	rgb(63, 99, 190)
HSL	hsl(223, 50%, 50%)
HSV	hsv(223, 67%, 75%)
CMYK	cmyk(66.8%, 47.9%, 0%, 25.5%)
CIE-LAB	lab(43.79, 17.20, -51.74)
CIE-LCH	lch(43.79, 54.52, 288.39°)
OKLab	oklab(52.15% -0.0121 -0.1482)
OKLCH	oklch(52.15% 0.149 265.3)
XYZ	xyz(15.8028, 13.6966, 50.5161)
Luminance	0.1370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63BE #BE9A3F

analogous

#3FA3BE #3F63BE #5A3FBE

triadic

#3F63BE #BE3F63 #63BE3F

tetradic

#3F63BE #BE3FA3 #BE9A3F #3FBE5A

square

#3F63BE #BE3FA3 #BE9A3F #3FBE5A

split-complementary

#3F63BE #BE5A3F #A3BE3F

monochromatic

#213362 #304B90 #3F63BE #6C88CE #9AADDD

Accessibility & contrast

On white

5.62

#3F63BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#3F63BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63BE

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63BE	#FFFFFF	#000000	##FFFFFF
##3F63BE	1.00	5.62	3.74	5.62
#FFFFFF	5.62	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#336EC1

Deuteranopia (green-blind)

#1662BC

Tritanopia (blue-blind)

#007887

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3f63be;
/* rgb */ color: rgb(63, 99, 190);
/* oklch */ color: oklch(52.1% 0.149 265.3);

Tailwind

colors: {
  custom: {
    50: '#828ed2',
    500: '#3f63be',
    950: '#000000',
  },
}

SCSS

$custom: #3f63be;
$custom-light: #828ed2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63be",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 190
  },
  "hsl": {
    "h": 222.992,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.5215,
    "c": 0.14868,
    "h": 265.3
  },
  "luminance": 0.13698
}

Semantic roles & 50–950 ramp

primary

#3F63BE

secondary

#C9B98F

accent

#B24EDA

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0C0C14

muted

#7D7D83

Preview Lab

Preview with #3F63BE

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

Preview Lab → · Contrast checker → · Palette generator →