#3F45CF#3F45CF

#3F45CF is a mid, highly saturated blue. Relative luminance 0.098; OKLCH L 47.9% C 0.208 H 273.5°. Best body text is #FFFFFF at 7.09:1 contrast (WCAG AA passes).

Color values

HEX	#3F45CF
RGB	rgb(63, 69, 207)
HSL	hsl(238, 60%, 53%)
HSV	hsv(238, 70%, 81%)
CMYK	cmyk(69.6%, 66.7%, 0%, 18.8%)
CIE-LAB	lab(37.51, 42.15, -71.80)
CIE-LCH	lch(37.51, 83.26, 300.41°)
OKLab	oklab(47.86% 0.0125 -0.2075)
OKLCH	oklch(47.86% 0.208 273.5)
XYZ	xyz(15.4367, 9.8165, 60.1006)
Luminance	0.0982 (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

#3F45CF #CFC93F

analogous

#3F8DCF #3F45CF #813FCF

triadic

#3F45CF #CF3F45 #45CF3F

tetradic

#3F45CF #CF3F8D #CFC93F #3FCF81

square

#3F45CF #CF3F8D #CFC93F #3FCF81

split-complementary

#3F45CF #CF813F #8DCF3F

monochromatic

#1E2176 #2A2FA7 #3F45CF #7074DB #A1A4E7

Accessibility & contrast

On white

7.09

#3F45CF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#3F45CF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45CF

7.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45CF	#FFFFFF	#000000	##FFFFFF
##3F45CF	1.00	7.09	2.96	7.09
#FFFFFF	7.09	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FD3

Deuteranopia (green-blind)

#0052CC

Tritanopia (blue-blind)

#006A84

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f45cf;
/* rgb */ color: rgb(63, 69, 207);
/* oklch */ color: oklch(47.9% 0.208 273.5);

Tailwind

colors: {
  custom: {
    50: '#8779df',
    500: '#3f45cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f45cf;
$custom-light: #8779df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45cf",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 207
  },
  "hsl": {
    "h": 237.5,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.47864,
    "c": 0.20784,
    "h": 273.5
  },
  "luminance": 0.09818
}

Semantic roles & 50–950 ramp

primary

#3F45CF

secondary

#D4D196

accent

#DD45E3

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F45CF

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

Preview Lab → · Contrast checker → · Palette generator →