#3F579D#3F579D

#3F579D is a mid, moderate blue. Relative luminance 0.103; OKLCH L 47.4% C 0.117 H 267.6°. Best body text is #FFFFFF at 6.86:1 contrast (WCAG AA passes).

Color values

HEX	#3F579D
RGB	rgb(63, 87, 157)
HSL	hsl(225, 43%, 43%)
HSV	hsv(225, 60%, 62%)
CMYK	cmyk(59.9%, 44.6%, 0%, 38.4%)
CIE-LAB	lab(38.39, 13.17, -40.94)
CIE-LCH	lch(38.39, 43.01, 287.83°)
OKLab	oklab(47.35% -0.0049 -0.1166)
OKLCH	oklch(47.35% 0.117 267.6)
XYZ	xyz(11.5418, 10.3065, 33.2729)
Luminance	0.1031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F579D #9D853F

analogous

#3F869D #3F579D #563F9D

triadic

#3F579D #9D3F57 #579D3F

tetradic

#3F579D #9D3F86 #9D853F #3F9D56

square

#3F579D #9D3F86 #9D853F #3F9D56

split-complementary

#3F579D #9D563F #869D3F

monochromatic

#1C2746 #2D3F71 #3F579D #5C75BD #879ACF

Accessibility & contrast

On white

6.86

#3F579D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#3F579D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F579D

6.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F579D	#FFFFFF	#000000	##FFFFFF
##3F579D	1.00	6.86	3.06	6.86
#FFFFFF	6.86	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#375FA0

Deuteranopia (green-blind)

#2A569C

Tritanopia (blue-blind)

#006772

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3f579d;
/* rgb */ color: rgb(63, 87, 157);
/* oklch */ color: oklch(47.4% 0.117 267.6);

Tailwind

colors: {
  custom: {
    50: '#7c86ba',
    500: '#3f579d',
    950: '#000000',
  },
}

SCSS

$custom: #3f579d;
$custom-light: #7c86ba;
$custom-dark: #000000;

JSON

{
  "hex": "#3f579d",
  "rgb": {
    "r": 63,
    "g": 87,
    "b": 157
  },
  "hsl": {
    "h": 224.681,
    "s": 42.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.47351,
    "c": 0.11673,
    "h": 267.6
  },
  "luminance": 0.10307
}

Semantic roles & 50–950 ramp

primary

#3F579D

secondary

#BAAA7E

accent

#B355D3

background

#F7F8FB

surface

#EEEFF6

border

#C9CAD0

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #3F579D

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

Preview Lab → · Contrast checker → · Palette generator →