#3F5178#3F5178

#3F5178 is a dark, moderate blue. Relative luminance 0.083; OKLCH L 43.8% C 0.069 H 264.8°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F5178
RGB	rgb(63, 81, 120)
HSL	hsl(221, 31%, 36%)
HSV	hsv(221, 48%, 47%)
CMYK	cmyk(47.5%, 32.5%, 0%, 52.9%)
CIE-LAB	lab(34.59, 4.47, -24.38)
CIE-LCH	lch(34.59, 24.79, 280.39°)
OKLab	oklab(43.76% -0.0062 -0.0684)
OKLCH	oklch(43.76% 0.069 264.8)
XYZ	xyz(8.3814, 8.2972, 18.9255)
Luminance	0.0830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5178 #78663F

analogous

#3F6D78 #3F5178 #493F78

triadic

#3F5178 #783F51 #51783F

tetradic

#3F5178 #783F6D #78663F #3F7849

square

#3F5178 #783F6D #78663F #3F7849

split-complementary

#3F5178 #78493F #6D783F

monochromatic

#151B28 #2A3650 #3F5178 #546CA0 #798DB9

Accessibility & contrast

On white

7.90

#3F5178 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3F5178 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F5178

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5178	#FFFFFF	#000000	##FFFFFF
##3F5178	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)

#43547A

Deuteranopia (green-blind)

#3D4F77

Tritanopia (blue-blind)

#29595F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f5178;
/* rgb */ color: rgb(63, 81, 120);
/* oklch */ color: oklch(43.8% 0.069 264.8);

Tailwind

colors: {
  custom: {
    50: '#77819f',
    500: '#3f5178',
    950: '#000000',
  },
}

SCSS

$custom: #3f5178;
$custom-light: #77819f;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5178",
  "rgb": {
    "r": 63,
    "g": 81,
    "b": 120
  },
  "hsl": {
    "h": 221.053,
    "s": 31.148,
    "l": 35.882
  },
  "oklch": {
    "l": 0.4376,
    "c": 0.06864,
    "h": 264.8
  },
  "luminance": 0.08298
}

Semantic roles & 50–950 ramp

primary

#3F5178

secondary

#A39370

accent

#A760C7

background

#F7F7F9

surface

#EDEEF2

border

#C8C9CC

text

#090A0E

muted

#7B7C7E

Preview Lab

Preview with #3F5178

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

Preview Lab → · Contrast checker → · Palette generator →