#3F43C9#3F43C9

#3F43C9 is a mid, highly saturated blue. Relative luminance 0.093; OKLCH L 47.0% C 0.203 H 274.1°. Best body text is #FFFFFF at 7.35:1 contrast (WCAG AA passes).

Color values

HEX	#3F43C9
RGB	rgb(63, 67, 201)
HSL	hsl(238, 56%, 52%)
HSV	hsv(238, 69%, 79%)
CMYK	cmyk(68.7%, 66.7%, 0%, 21.2%)
CIE-LAB	lab(36.53, 41.33, -69.93)
CIE-LCH	lch(36.53, 81.23, 300.58°)
OKLab	oklab(46.99% 0.0145 -0.202)
OKLCH	oklch(46.99% 0.203 274.1)
XYZ	xyz(14.5962, 9.2868, 56.2703)
Luminance	0.0929 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 2.71

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F43C9 #C9C53F

analogous

#3F88C9 #3F43C9 #803FC9

triadic

#3F43C9 #C93F43 #43C93F

tetradic

#3F43C9 #C93F88 #C9C53F #3FC980

square

#3F43C9 #C93F88 #C9C53F #3FC980

split-complementary

#3F43C9 #C9803F #88C93F

monochromatic

#1F216F #2D309E #3F43C9 #6F72D6 #9FA1E4

Accessibility & contrast

On white

7.35

#3F43C9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#3F43C9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F43C9

7.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43C9	#FFFFFF	#000000	##FFFFFF
##3F43C9	1.00	7.35	2.86	7.35
#FFFFFF	7.35	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CCD

Deuteranopia (green-blind)

#0050C6

Tritanopia (blue-blind)

#006780

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f43c9;
/* rgb */ color: rgb(63, 67, 201);
/* oklch */ color: oklch(47.0% 0.203 274.1);

Tailwind

colors: {
  custom: {
    50: '#8678db',
    500: '#3f43c9',
    950: '#000000',
  },
}

SCSS

$custom: #3f43c9;
$custom-light: #8678db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43c9",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 201
  },
  "hsl": {
    "h": 238.261,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.46989,
    "c": 0.20251,
    "h": 274.1
  },
  "luminance": 0.09288
}

Semantic roles & 50–950 ramp

primary

#3F43C9

secondary

#D0CE94

accent

#DB48DF

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F43C9

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

Preview Lab → · Contrast checker → · Palette generator →