#3F43CB#3F43CB

#3F43CB is a mid, highly saturated blue. Relative luminance 0.094; OKLCH L 47.2% C 0.205 H 274.0°. Best body text is #FFFFFF at 7.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F43CB
RGB	rgb(63, 67, 203)
HSL	hsl(238, 57%, 52%)
HSV	hsv(238, 69%, 80%)
CMYK	cmyk(69%, 67%, 0%, 20.4%)
CIE-LAB	lab(36.71, 42.00, -70.80)
CIE-LCH	lch(36.71, 82.32, 300.68°)
OKLab	oklab(47.17% 0.0143 -0.2045)
OKLCH	oklch(47.17% 0.205 274)
XYZ	xyz(14.8330, 9.3815, 57.5174)
Luminance	0.0938 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 2.80

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F43CB #CBC73F

analogous

#3F89CB #3F43CB #813FCB

triadic

#3F43CB #CB3F43 #43CB3F

tetradic

#3F43CB #CB3F89 #CBC73F #3FCB81

square

#3F43CB #CB3F89 #CBC73F #3FCB81

split-complementary

#3F43CB #CB813F #89CB3F

monochromatic

#1F2171 #2C2FA1 #3F43CB #6F72D8 #9FA1E5

Accessibility & contrast

On white

7.30

#3F43CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#3F43CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F43CB

7.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43CB	#FFFFFF	#000000	##FFFFFF
##3F43CB	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)

#005DCF

Deuteranopia (green-blind)

#0050C8

Tritanopia (blue-blind)

#006781

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f43cb;
/* rgb */ color: rgb(63, 67, 203);
/* oklch */ color: oklch(47.2% 0.205 274.0);

Tailwind

colors: {
  custom: {
    50: '#8678dc',
    500: '#3f43cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f43cb;
$custom-light: #8678dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43cb",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 203
  },
  "hsl": {
    "h": 238.286,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.47173,
    "c": 0.20503,
    "h": 274
  },
  "luminance": 0.09383
}

Semantic roles & 50–950 ramp

primary

#3F43CB

secondary

#D1D094

accent

#DC47E1

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F43CB

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

Preview Lab → · Contrast checker → · Palette generator →