#3F45C6#3F45C6

#3F45C6 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 47.0% C 0.196 H 273.9°. Best body text is #FFFFFF at 7.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F45C6
RGB	rgb(63, 69, 198)
HSL	hsl(237, 54%, 51%)
HSV	hsv(237, 68%, 78%)
CMYK	cmyk(68.2%, 65.2%, 0%, 22.4%)
CIE-LAB	lab(36.72, 39.10, -67.87)
CIE-LCH	lch(36.72, 78.32, 299.95°)
OKLab	oklab(47.05% 0.0134 -0.196)
OKLCH	oklch(47.05% 0.196 273.9)
XYZ	xyz(14.3677, 9.3889, 54.4702)
Luminance	0.0939 (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

#3F45C6 #C6C03F

analogous

#3F88C6 #3F45C6 #7C3FC6

triadic

#3F45C6 #C63F45 #45C63F

tetradic

#3F45C6 #C63F88 #C6C03F #3FC67C

square

#3F45C6 #C63F88 #C6C03F #3FC67C

split-complementary

#3F45C6 #C67C3F #88C63F

monochromatic

#20236B #2E339A #3F45C6 #6E73D4 #9DA0E2

Accessibility & contrast

On white

7.30

#3F45C6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#3F45C6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45C6

7.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45C6	#FFFFFF	#000000	##FFFFFF
##3F45C6	1.00	7.30	2.88	7.30
#FFFFFF	7.30	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DCA

Deuteranopia (green-blind)

#0050C4

Tritanopia (blue-blind)

#00677F

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f45c6;
/* rgb */ color: rgb(63, 69, 198);
/* oklch */ color: oklch(47.0% 0.196 273.9);

Tailwind

colors: {
  custom: {
    50: '#8579d8',
    500: '#3f45c6',
    950: '#000000',
  },
}

SCSS

$custom: #3f45c6;
$custom-light: #8579d8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45c6",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 198
  },
  "hsl": {
    "h": 237.333,
    "s": 54.217,
    "l": 51.176
  },
  "oklch": {
    "l": 0.47048,
    "c": 0.1964,
    "h": 273.9
  },
  "luminance": 0.0939
}

Semantic roles & 50–950 ramp

primary

#3F45C6

secondary

#CECC93

accent

#D74ADE

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0C0915

muted

#7D7B83

Preview Lab

Preview with #3F45C6

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

Preview Lab → · Contrast checker → · Palette generator →