#3F53CC#3F53CC

#3F53CC is a mid, vivid blue. Relative luminance 0.116; OKLCH L 50.0% C 0.188 H 270.8°. Best body text is #FFFFFF at 6.32:1 contrast (WCAG AA passes).

Color values

HEX	#3F53CC
RGB	rgb(63, 83, 204)
HSL	hsl(231, 58%, 52%)
HSV	hsv(231, 69%, 80%)
CMYK	cmyk(69.1%, 59.3%, 0%, 20%)
CIE-LAB	lab(40.58, 32.44, -65.06)
CIE-LCH	lch(40.58, 72.69, 296.50°)
OKLab	oklab(50.04% 0.0027 -0.1876)
OKLCH	oklch(50.04% 0.188 270.8)
XYZ	xyz(16.0385, 11.6013, 58.5091)
Luminance	0.1160 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F53CC #CCB83F

analogous

#3F9ACC #3F53CC #713FCC

triadic

#3F53CC #CC3F53 #53CC3F

tetradic

#3F53CC #CC3F9A #CCB83F #3FCC71

square

#3F53CC #CC3F9A #CCB83F #3FCC71

split-complementary

#3F53CC #CC713F #9ACC3F

monochromatic

#1E2A72 #2B3CA3 #3F53CC #6F7ED9 #A0AAE6

Accessibility & contrast

On white

6.32

#3F53CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.32

#3F53CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F53CC

6.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F53CC	#FFFFFF	#000000	##FFFFFF
##3F53CC	1.00	6.32	3.32	6.32
#FFFFFF	6.32	1.00	21.00	1.00
#000000	3.32	21.00	1.00	21.00
##FFFFFF	6.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066D0

Deuteranopia (green-blind)

#0059CA

Tritanopia (blue-blind)

#007187

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f53cc;
/* rgb */ color: rgb(63, 83, 204);
/* oklch */ color: oklch(50.0% 0.188 270.8);

Tailwind

colors: {
  custom: {
    50: '#8583dc',
    500: '#3f53cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f53cc;
$custom-light: #8583dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f53cc",
  "rgb": {
    "r": 63,
    "g": 83,
    "b": 204
  },
  "hsl": {
    "h": 231.489,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.50037,
    "c": 0.1876,
    "h": 270.8
  },
  "luminance": 0.11603
}

Semantic roles & 50–950 ramp

primary

#3F53CC

secondary

#D2C995

accent

#CB47E1

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F53CC

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

Preview Lab → · Contrast checker → · Palette generator →