#3F43CF#3F43CF

#3F43CF is a mid, highly saturated blue. Relative luminance 0.096; OKLCH L 47.5% C 0.210 H 273.8°. Best body text is #FFFFFF at 7.20:1 contrast (WCAG AA passes).

Color values

HEX	#3F43CF
RGB	rgb(63, 67, 207)
HSL	hsl(238, 60%, 53%)
HSV	hsv(238, 70%, 81%)
CMYK	cmyk(69.6%, 67.6%, 0%, 18.8%)
CIE-LAB	lab(37.07, 43.34, -72.53)
CIE-LCH	lch(37.07, 84.49, 300.86°)
OKLab	oklab(47.54% 0.0138 -0.2096)
OKLCH	oklch(47.54% 0.21 273.8)
XYZ	xyz(15.3158, 9.5746, 60.0603)
Luminance	0.0958 (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

#3F43CF #CFCB3F

analogous

#3F8BCF #3F43CF #833FCF

triadic

#3F43CF #CF3F43 #43CF3F

tetradic

#3F43CF #CF3F8B #CFCB3F #3FCF83

square

#3F43CF #CF3F8B #CFCB3F #3FCF83

split-complementary

#3F43CF #CF833F #8BCF3F

monochromatic

#1E2076 #2A2DA7 #3F43CF #7073DB #A1A3E7

Accessibility & contrast

On white

7.20

#3F43CF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#3F43CF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F43CF

7.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43CF	#FFFFFF	#000000	##FFFFFF
##3F43CF	1.00	7.20	2.92	7.20
#FFFFFF	7.20	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ED3

Deuteranopia (green-blind)

#0051CC

Tritanopia (blue-blind)

#006983

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f43cf;
/* rgb */ color: rgb(63, 67, 207);
/* oklch */ color: oklch(47.5% 0.210 273.8);

Tailwind

colors: {
  custom: {
    50: '#8778df',
    500: '#3f43cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f43cf;
$custom-light: #8778df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43cf",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 207
  },
  "hsl": {
    "h": 238.333,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.47543,
    "c": 0.21004,
    "h": 273.8
  },
  "luminance": 0.09576
}

Semantic roles & 50–950 ramp

primary

#3F43CF

secondary

#D4D296

accent

#DF45E3

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F43CF

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

Preview Lab → · Contrast checker → · Palette generator →