#3F43D9#3F43D9

#3F43D9 is a mid, highly saturated blue. Relative luminance 0.101; OKLCH L 48.5% C 0.222 H 273.2°. Best body text is #FFFFFF at 6.96:1 contrast (WCAG AA passes).

Color values

HEX	#3F43D9
RGB	rgb(63, 67, 217)
HSL	hsl(238, 67%, 55%)
HSV	hsv(238, 71%, 85%)
CMYK	cmyk(71%, 69.1%, 0%, 14.9%)
CIE-LAB	lab(37.98, 46.67, -76.78)
CIE-LCH	lch(37.98, 89.85, 301.29°)
OKLab	oklab(48.48% 0.0126 -0.222)
OKLCH	oklch(48.48% 0.222 273.2)
XYZ	xyz(16.5772, 10.0792, 66.7040)
Luminance	0.1008 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue (survey)

#0343DF

ΔE00 3.08

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F43D9 #D9D53F

analogous

#3F90D9 #3F43D9 #883FD9

triadic

#3F43D9 #D93F43 #43D93F

tetradic

#3F43D9 #D93F90 #D9D53F #3FD988

square

#3F43D9 #D93F90 #D9D53F #3FD988

split-complementary

#3F43D9 #D9883F #90D93F

monochromatic

#1A1D84 #2428B7 #3F43D9 #7275E3 #A5A7ED

Accessibility & contrast

On white

6.96

#3F43D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.02

#3F43D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F43D9

6.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43D9	#FFFFFF	#000000	##FFFFFF
##3F43D9	1.00	6.96	3.02	6.96
#FFFFFF	6.96	1.00	21.00	1.00
#000000	3.02	21.00	1.00	21.00
##FFFFFF	6.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061DE

Deuteranopia (green-blind)

#0052D6

Tritanopia (blue-blind)

#006C89

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f43d9;
/* rgb */ color: rgb(63, 67, 217);
/* oklch */ color: oklch(48.5% 0.222 273.2);

Tailwind

colors: {
  custom: {
    50: '#8978e6',
    500: '#3f43d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f43d9;
$custom-light: #8978e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43d9",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 217
  },
  "hsl": {
    "h": 238.442,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.48482,
    "c": 0.22239,
    "h": 273.2
  },
  "luminance": 0.10081
}

Semantic roles & 50–950 ramp

primary

#3F43D9

secondary

#DAD99A

accent

#E53EEA

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3F43D9

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

Preview Lab → · Contrast checker → · Palette generator →