#3F45C3#3F45C3

#3F45C3 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.8% C 0.193 H 274.1°. Best body text is #FFFFFF at 7.37:1 contrast (WCAG AA passes).

Color values

HEX	#3F45C3
RGB	rgb(63, 69, 195)
HSL	hsl(237, 52%, 51%)
HSV	hsv(237, 68%, 76%)
CMYK	cmyk(67.7%, 64.6%, 0%, 23.5%)
CIE-LAB	lab(36.46, 38.08, -66.54)
CIE-LCH	lch(36.46, 76.66, 299.78°)
OKLab	oklab(46.78% 0.0136 -0.192)
OKLCH	oklch(46.78% 0.193 274.1)
XYZ	xyz(14.0251, 9.2518, 52.6658)
Luminance	0.0925 (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

#3F45C3 #C3BD3F

analogous

#3F87C3 #3F45C3 #7B3FC3

triadic

#3F45C3 #C33F45 #45C33F

tetradic

#3F45C3 #C33F87 #C3BD3F #3FC37B

square

#3F45C3 #C33F87 #C3BD3F #3FC37B

split-complementary

#3F45C3 #C37B3F #87C33F

monochromatic

#202467 #2F3496 #3F45C3 #6E72D2 #9C9FE0

Accessibility & contrast

On white

7.37

#3F45C3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#3F45C3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45C3

7.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45C3	#FFFFFF	#000000	##FFFFFF
##3F45C3	1.00	7.37	2.85	7.37
#FFFFFF	7.37	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CC7

Deuteranopia (green-blind)

#0050C1

Tritanopia (blue-blind)

#00667E

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f45c3;
/* rgb */ color: rgb(63, 69, 195);
/* oklch */ color: oklch(46.8% 0.193 274.1);

Tailwind

colors: {
  custom: {
    50: '#8579d6',
    500: '#3f45c3',
    950: '#000000',
  },
}

SCSS

$custom: #3f45c3;
$custom-light: #8579d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45c3",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 195
  },
  "hsl": {
    "h": 237.273,
    "s": 52.381,
    "l": 50.588
  },
  "oklch": {
    "l": 0.46781,
    "c": 0.19253,
    "h": 274.1
  },
  "luminance": 0.09253
}

Semantic roles & 50–950 ramp

primary

#3F45C3

secondary

#CCCA92

accent

#D54CDC

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3F45C3

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

Preview Lab → · Contrast checker → · Palette generator →