#3F428E#3F428E

#3F428E is a dark, vivid blue. Relative luminance 0.069; OKLCH L 41.9% C 0.123 H 277.9°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F428E
RGB	rgb(63, 66, 142)
HSL	hsl(238, 39%, 40%)
HSV	hsv(238, 56%, 56%)
CMYK	cmyk(55.6%, 53.5%, 0%, 44.3%)
CIE-LAB	lab(31.59, 21.74, -42.74)
CIE-LCH	lch(31.59, 47.95, 296.96°)
OKLab	oklab(41.88% 0.0171 -0.1221)
OKLCH	oklch(41.88% 0.123 277.9)
XYZ	xyz(8.8791, 6.9056, 26.4510)
Luminance	0.0691 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F428E #8E8B3F

analogous

#3F698E #3F428E #643F8E

triadic

#3F428E #8E3F42 #428E3F

tetradic

#3F428E #8E3F69 #8E8B3F #3F8E64

square

#3F428E #8E3F69 #8E8B3F #3F8E64

split-complementary

#3F428E #8E643F #698E3F

monochromatic

#191B39 #2C2E64 #3F428E #565AB4 #8183C7

Accessibility & contrast

On white

8.82

#3F428E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3F428E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F428E

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F428E	#FFFFFF	#000000	##FFFFFF
##3F428E	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194E91

Deuteranopia (green-blind)

#0B478C

Tritanopia (blue-blind)

#195361

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f428e;
/* rgb */ color: rgb(63, 66, 142);
/* oklch */ color: oklch(41.9% 0.123 277.9);

Tailwind

colors: {
  custom: {
    50: '#7b76b0',
    500: '#3f428e',
    950: '#000000',
  },
}

SCSS

$custom: #3f428e;
$custom-light: #7b76b0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f428e",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 142
  },
  "hsl": {
    "h": 237.722,
    "s": 38.537,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41882,
    "c": 0.12332,
    "h": 277.9
  },
  "luminance": 0.06906
}

Semantic roles & 50–950 ramp

primary

#3F428E

secondary

#B1AF78

accent

#CA59CE

background

#F7F7FA

surface

#EEEDF5

border

#C9C8CF

text

#0A0810

muted

#7C7B7F

Preview Lab

Preview with #3F428E

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

Preview Lab → · Contrast checker → · Palette generator →