#3F578E#3F578E

#3F578E is a mid, moderate blue. Relative luminance 0.098; OKLCH L 46.4% C 0.094 H 265.1°. Best body text is #FFFFFF at 7.08:1 contrast (WCAG AA passes).

Color values

HEX	#3F578E
RGB	rgb(63, 87, 142)
HSL	hsl(222, 39%, 40%)
HSV	hsv(222, 56%, 56%)
CMYK	cmyk(55.6%, 38.7%, 0%, 44.3%)
CIE-LAB	lab(37.53, 7.96, -33.27)
CIE-LCH	lch(37.53, 34.20, 283.46°)
OKLab	oklab(46.41% -0.0081 -0.0941)
OKLCH	oklch(46.41% 0.094 265.1)
XYZ	xyz(10.3389, 9.8254, 26.9376)
Luminance	0.0983 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F578E #8E763F

analogous

#3F7F8E #3F578E #4E3F8E

triadic

#3F578E #8E3F57 #578E3F

tetradic

#3F578E #8E3F7F #8E763F #3F8E4E

square

#3F578E #8E3F7F #8E763F #3F8E4E

split-complementary

#3F578E #8E4E3F #7F8E3F

monochromatic

#192339 #2C3D64 #3F578E #5673B4 #8196C7

Accessibility & contrast

On white

7.08

#3F578E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#3F578E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F578E

7.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F578E	#FFFFFF	#000000	##FFFFFF
##3F578E	1.00	7.08	2.97	7.08
#FFFFFF	7.08	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#415C90

Deuteranopia (green-blind)

#37558D

Tritanopia (blue-blind)

#13636B

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f578e;
/* rgb */ color: rgb(63, 87, 142);
/* oklch */ color: oklch(46.4% 0.094 265.1);

Tailwind

colors: {
  custom: {
    50: '#7a86af',
    500: '#3f578e',
    950: '#000000',
  },
}

SCSS

$custom: #3f578e;
$custom-light: #7a86af;
$custom-dark: #000000;

JSON

{
  "hex": "#3f578e",
  "rgb": {
    "r": 63,
    "g": 87,
    "b": 142
  },
  "hsl": {
    "h": 221.772,
    "s": 38.537,
    "l": 40.196
  },
  "oklch": {
    "l": 0.4641,
    "c": 0.09449,
    "h": 265.1
  },
  "luminance": 0.09826
}

Semantic roles & 50–950 ramp

primary

#3F578E

secondary

#B1A078

accent

#AB59CE

background

#F7F8FA

surface

#EEEFF4

border

#C9CACE

text

#0A0B10

muted

#7C7C7F

Preview Lab

Preview with #3F578E

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

Preview Lab → · Contrast checker → · Palette generator →