#3F5BC1#3F5BC1

#3F5BC1 is a mid, vivid blue. Relative luminance 0.124; OKLCH L 50.7% C 0.163 H 268.5°. Best body text is #FFFFFF at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BC1
RGB	rgb(63, 91, 193)
HSL	hsl(227, 51%, 50%)
HSV	hsv(227, 67%, 76%)
CMYK	cmyk(67.4%, 52.8%, 0%, 24.3%)
CIE-LAB	lab(41.83, 23.41, -56.65)
CIE-LCH	lch(41.83, 61.30, 292.45°)
OKLab	oklab(50.72% -0.0044 -0.1628)
OKLCH	oklch(50.72% 0.163 268.5)
XYZ	xyz(15.4133, 12.3877, 52.0205)
Luminance	0.1239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BC1 #C1A53F

analogous

#3F9CC1 #3F5BC1 #643FC1

triadic

#3F5BC1 #C13F5B #5BC13F

tetradic

#3F5BC1 #C13F9C #C1A53F #3FC164

square

#3F5BC1 #C13F9C #C1A53F #3FC164

split-complementary

#3F5BC1 #C1643F #9CC13F

monochromatic

#212F65 #304593 #3F5BC1 #6D83D0 #9CAADF

Accessibility & contrast

On white

6.04

#3F5BC1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#3F5BC1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BC1

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BC1	#FFFFFF	#000000	##FFFFFF
##3F5BC1	1.00	6.04	3.48	6.04
#FFFFFF	6.04	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1769C5

Deuteranopia (green-blind)

#005DBF

Tritanopia (blue-blind)

#007385

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f5bc1;
/* rgb */ color: rgb(63, 91, 193);
/* oklch */ color: oklch(50.7% 0.163 268.5);

Tailwind

colors: {
  custom: {
    50: '#8389d4',
    500: '#3f5bc1',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bc1;
$custom-light: #8389d4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bc1",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 193
  },
  "hsl": {
    "h": 227.077,
    "s": 51.181,
    "l": 50.196
  },
  "oklch": {
    "l": 0.50718,
    "c": 0.16283,
    "h": 268.5
  },
  "luminance": 0.12389
}

Semantic roles & 50–950 ramp

primary

#3F5BC1

secondary

#CBBE91

accent

#BC4DDB

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #3F5BC1

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

Preview Lab → · Contrast checker → · Palette generator →