#3F378F#3F378F

#3F378F is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.9% C 0.140 H 282.1°. Best body text is #FFFFFF at 9.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F378F
RGB	rgb(63, 55, 143)
HSL	hsl(245, 44%, 39%)
HSV	hsv(245, 62%, 56%)
CMYK	cmyk(55.9%, 61.5%, 0%, 43.9%)
CIE-LAB	lab(28.83, 29.24, -47.82)
CIE-LCH	lch(28.83, 56.05, 301.45°)
OKLab	oklab(39.85% 0.0293 -0.1372)
OKLCH	oklch(39.85% 0.14 282.1)
XYZ	xyz(8.3725, 5.7718, 26.6542)
Luminance	0.0577 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F378F #878F37

analogous

#375B8F #3F378F #6B378F

triadic

#3F378F #8F3F37 #378F3F

tetradic

#3F378F #8F375B #878F37 #378F6B

square

#3F378F #8F375B #878F37 #378F6B

split-complementary

#3F378F #8F6B37 #5B8F37

monochromatic

#181537 #2C2663 #3F378F #544AB9 #7E76CA

Accessibility & contrast

On white

9.75

#3F378F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#3F378F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F378F

9.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F378F	#FFFFFF	#000000	##FFFFFF
##3F378F	1.00	9.75	2.15	9.75
#FFFFFF	9.75	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004792

Deuteranopia (green-blind)

#00418D

Tritanopia (blue-blind)

#1A4C5D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3f378f;
/* rgb */ color: rgb(63, 55, 143);
/* oklch */ color: oklch(39.9% 0.140 282.1);

Tailwind

colors: {
  custom: {
    50: '#7c6eb0',
    500: '#3f378f',
    950: '#000000',
  },
}

SCSS

$custom: #3f378f;
$custom-light: #7c6eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f378f",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 143
  },
  "hsl": {
    "h": 245.455,
    "s": 44.444,
    "l": 38.824
  },
  "oklch": {
    "l": 0.39854,
    "c": 0.14027,
    "h": 282.1
  },
  "luminance": 0.05772
}

Semantic roles & 50–950 ramp

primary

#3F378F

secondary

#ADB36F

accent

#D454C8

background

#F7F6FA

surface

#EEECF5

border

#C9C7CF

text

#0A0711

muted

#7C7A80

Preview Lab

Preview with #3F378F

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

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