#3F45C2#3F45C2

#3F45C2 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.7% C 0.191 H 274.1°. Best body text is #FFFFFF at 7.39:1 contrast (WCAG AA passes).

Color values

HEX	#3F45C2
RGB	rgb(63, 69, 194)
HSL	hsl(237, 52%, 50%)
HSV	hsv(237, 68%, 76%)
CMYK	cmyk(67.5%, 64.4%, 0%, 23.9%)
CIE-LAB	lab(36.38, 37.73, -66.09)
CIE-LCH	lch(36.38, 76.11, 299.72°)
OKLab	oklab(46.69% 0.0137 -0.1907)
OKLCH	oklch(46.69% 0.191 274.1)
XYZ	xyz(13.9124, 9.2068, 52.0724)
Luminance	0.0921 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F45C2 #C2BC3F

analogous

#3F86C2 #3F45C2 #7A3FC2

triadic

#3F45C2 #C23F45 #45C23F

tetradic

#3F45C2 #C23F86 #C2BC3F #3FC27A

square

#3F45C2 #C23F86 #C2BC3F #3FC27A

split-complementary

#3F45C2 #C27A3F #86C23F

monochromatic

#202466 #2F3495 #3F45C2 #6D72D1 #9C9FE0

Accessibility & contrast

On white

7.39

#3F45C2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#3F45C2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45C2

7.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45C2	#FFFFFF	#000000	##FFFFFF
##3F45C2	1.00	7.39	2.84	7.39
#FFFFFF	7.39	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CC6

Deuteranopia (green-blind)

#0050C0

Tritanopia (blue-blind)

#00657D

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f45c2;
/* rgb */ color: rgb(63, 69, 194);
/* oklch */ color: oklch(46.7% 0.191 274.1);

Tailwind

colors: {
  custom: {
    50: '#8479d5',
    500: '#3f45c2',
    950: '#000000',
  },
}

SCSS

$custom: #3f45c2;
$custom-light: #8479d5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45c2",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 194
  },
  "hsl": {
    "h": 237.252,
    "s": 51.779,
    "l": 50.392
  },
  "oklch": {
    "l": 0.46692,
    "c": 0.19124,
    "h": 274.1
  },
  "luminance": 0.09208
}

Semantic roles & 50–950 ramp

primary

#3F45C2

secondary

#CCC991

accent

#D54DDB

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3F45C2

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

Preview Lab → · Contrast checker → · Palette generator →