#3F55CA#3F55CA

#3F55CA is a mid, vivid blue. Relative luminance 0.118; OKLCH L 50.2% C 0.182 H 270.4°. Best body text is #FFFFFF at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#3F55CA
RGB	rgb(63, 85, 202)
HSL	hsl(231, 57%, 52%)
HSV	hsv(231, 69%, 79%)
CMYK	cmyk(68.8%, 57.9%, 0%, 20.8%)
CIE-LAB	lab(40.92, 30.46, -63.33)
CIE-LCH	lch(40.92, 70.28, 295.69°)
OKLab	oklab(50.25% 0.0011 -0.1825)
OKLCH	oklch(50.25% 0.183 270.4)
XYZ	xyz(15.9554, 11.8165, 57.3056)
Luminance	0.1182 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55CA #CAB43F

analogous

#3F9ACA #3F55CA #6F3FCA

triadic

#3F55CA #CA3F55 #55CA3F

tetradic

#3F55CA #CA3F9A #CAB43F #3FCA6F

square

#3F55CA #CA3F9A #CAB43F #3FCA6F

split-complementary

#3F55CA #CA6F3F #9ACA3F

monochromatic

#1F2C70 #2C3EA0 #3F55CA #6F7FD7 #9FAAE4

Accessibility & contrast

On white

6.24

#3F55CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#3F55CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55CA

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55CA	#FFFFFF	#000000	##FFFFFF
##3F55CA	1.00	6.24	3.36	6.24
#FFFFFF	6.24	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0067CE

Deuteranopia (green-blind)

#005AC8

Tritanopia (blue-blind)

#007287

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f55ca;
/* rgb */ color: rgb(63, 85, 202);
/* oklch */ color: oklch(50.2% 0.182 270.4);

Tailwind

colors: {
  custom: {
    50: '#8584db',
    500: '#3f55ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f55ca;
$custom-light: #8584db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55ca",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 202
  },
  "hsl": {
    "h": 230.504,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.50247,
    "c": 0.1825,
    "h": 270.4
  },
  "luminance": 0.11818
}

Semantic roles & 50–950 ramp

primary

#3F55CA

secondary

#D1C794

accent

#C848E0

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F55CA

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

Preview Lab → · Contrast checker → · Palette generator →