#3F43B2#3F43B2

#3F43B2 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 45.0% C 0.173 H 275.4°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F43B2
RGB	rgb(63, 67, 178)
HSL	hsl(238, 48%, 47%)
HSV	hsv(238, 65%, 70%)
CMYK	cmyk(64.6%, 62.4%, 0%, 30.2%)
CIE-LAB	lab(34.57, 33.49, -59.63)
CIE-LCH	lch(34.57, 68.39, 299.32°)
OKLab	oklab(44.95% 0.0163 -0.1718)
OKLCH	oklch(44.95% 0.173 275.4)
XYZ	xyz(12.0903, 8.2844, 43.0728)
Luminance	0.0828 (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

#3F43B2 #B2AE3F

analogous

#3F7DB2 #3F43B2 #753FB2

triadic

#3F43B2 #B23F43 #43B23F

tetradic

#3F43B2 #B23F7D #B2AE3F #3FB275

square

#3F43B2 #B23F7D #B2AE3F #3FB275

split-complementary

#3F43B2 #B2753F #7DB23F

monochromatic

#1F2158 #2F3285 #3F43B2 #6669C9 #9395D9

Accessibility & contrast

On white

7.90

#3F43B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3F43B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F43B2

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43B2	#FFFFFF	#000000	##FFFFFF
##3F43B2	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B6

Deuteranopia (green-blind)

#004CB0

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f43b2;
/* rgb */ color: rgb(63, 67, 178);
/* oklch */ color: oklch(45.0% 0.173 275.4);

Tailwind

colors: {
  custom: {
    50: '#8177ca',
    500: '#3f43b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f43b2;
$custom-light: #8177ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43b2",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 178
  },
  "hsl": {
    "h": 237.913,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44951,
    "c": 0.17257,
    "h": 275.4
  },
  "luminance": 0.08285
}

Semantic roles & 50–950 ramp

primary

#3F43B2

secondary

#C4C289

accent

#D350D7

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #3F43B2

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

Preview Lab → · Contrast checker → · Palette generator →