#3F45C8#3F45C8

#3F45C8 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 47.2% C 0.199 H 273.8°. Best body text is #FFFFFF at 7.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F45C8
RGB	rgb(63, 69, 200)
HSL	hsl(237, 55%, 52%)
HSV	hsv(237, 69%, 78%)
CMYK	cmyk(68.5%, 65.5%, 0%, 21.6%)
CIE-LAB	lab(36.90, 39.78, -68.75)
CIE-LCH	lch(36.90, 79.43, 300.05°)
OKLab	oklab(47.23% 0.0132 -0.1985)
OKLCH	oklch(47.23% 0.199 273.8)
XYZ	xyz(14.5999, 9.4818, 55.6931)
Luminance	0.0948 (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

#3F45C8 #C8C23F

analogous

#3F8AC8 #3F45C8 #7E3FC8

triadic

#3F45C8 #C83F45 #45C83F

tetradic

#3F45C8 #C83F8A #C8C23F #3FC87E

square

#3F45C8 #C83F8A #C8C23F #3FC87E

split-complementary

#3F45C8 #C87E3F #8AC83F

monochromatic

#1F236D #2D329D #3F45C8 #6F73D6 #9EA1E3

Accessibility & contrast

On white

7.25

#3F45C8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#3F45C8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45C8

7.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45C8	#FFFFFF	#000000	##FFFFFF
##3F45C8	1.00	7.25	2.90	7.25
#FFFFFF	7.25	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DCC

Deuteranopia (green-blind)

#0051C6

Tritanopia (blue-blind)

#006780

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f45c8;
/* rgb */ color: rgb(63, 69, 200);
/* oklch */ color: oklch(47.2% 0.199 273.8);

Tailwind

colors: {
  custom: {
    50: '#8679da',
    500: '#3f45c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f45c8;
$custom-light: #8679da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45c8",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 200
  },
  "hsl": {
    "h": 237.372,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.47228,
    "c": 0.19896,
    "h": 273.8
  },
  "luminance": 0.09483
}

Semantic roles & 50–950 ramp

primary

#3F45C8

secondary

#D0CD93

accent

#D849DF

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0D0915

muted

#7D7B83

Preview Lab

Preview with #3F45C8

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

Preview Lab → · Contrast checker → · Palette generator →