#3F42AC#3F42AC

#3F42AC is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.3% C 0.166 H 276.0°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#3F42AC
RGB	rgb(63, 66, 172)
HSL	hsl(238, 46%, 46%)
HSV	hsv(238, 63%, 67%)
CMYK	cmyk(63.4%, 61.6%, 0%, 32.5%)
CIE-LAB	lab(33.84, 32.06, -57.25)
CIE-LCH	lch(33.84, 65.62, 299.25°)
OKLab	oklab(44.26% 0.0174 -0.1648)
OKLCH	oklch(44.26% 0.166 276)
XYZ	xyz(11.4421, 7.9308, 39.9496)
Luminance	0.0793 (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

#3F42AC #ACA93F

analogous

#3F78AC #3F42AC #723FAC

triadic

#3F42AC #AC3F42 #42AC3F

tetradic

#3F42AC #AC3F78 #ACA93F #3FAC72

square

#3F42AC #AC3F78 #ACA93F #3FAC72

split-complementary

#3F42AC #AC723F #78AC3F

monochromatic

#1E2052 #2F317F #3F42AC #6365C6 #8F91D6

Accessibility & contrast

On white

8.12

#3F42AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3F42AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F42AC

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F42AC	#FFFFFF	#000000	##FFFFFF
##3F42AC	1.00	8.12	2.59	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054AF

Deuteranopia (green-blind)

#004BAA

Tritanopia (blue-blind)

#005C70

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3f42ac;
/* rgb */ color: rgb(63, 66, 172);
/* oklch */ color: oklch(44.3% 0.166 276.0);

Tailwind

colors: {
  custom: {
    50: '#8076c6',
    500: '#3f42ac',
    950: '#000000',
  },
}

SCSS

$custom: #3f42ac;
$custom-light: #8076c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f42ac",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 172
  },
  "hsl": {
    "h": 238.349,
    "s": 46.383,
    "l": 46.078
  },
  "oklch": {
    "l": 0.44262,
    "c": 0.16574,
    "h": 276
  },
  "luminance": 0.07932
}

Semantic roles & 50–950 ramp

primary

#3F42AC

secondary

#C1C086

accent

#D252D6

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3F42AC

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

Preview Lab → · Contrast checker → · Palette generator →