#3F519E#3F519E

#3F519E is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.1% C 0.126 H 270.8°. Best body text is #FFFFFF at 7.29:1 contrast (WCAG AA passes).

Color values

HEX	#3F519E
RGB	rgb(63, 81, 158)
HSL	hsl(229, 43%, 43%)
HSV	hsv(229, 60%, 62%)
CMYK	cmyk(60.1%, 48.7%, 0%, 38%)
CIE-LAB	lab(36.76, 17.43, -44.14)
CIE-LCH	lch(36.76, 47.46, 291.55°)
OKLab	oklab(46.13% 0.0019 -0.1261)
OKLCH	oklch(46.13% 0.126 270.8)
XYZ	xyz(11.1618, 9.4094, 33.5691)
Luminance	0.0941 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F519E #9E8C3F

analogous

#3F809E #3F519E #5D3F9E

triadic

#3F519E #9E3F51 #519E3F

tetradic

#3F519E #9E3F80 #9E8C3F #3F9E5D

square

#3F519E #9E3F80 #9E8C3F #3F9E5D

split-complementary

#3F519E #9E5D3F #809E3F

monochromatic

#1C2446 #2E3B72 #3F519E #5C6FBE #8895D0

Accessibility & contrast

On white

7.29

#3F519E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#3F519E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F519E

7.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F519E	#FFFFFF	#000000	##FFFFFF
##3F519E	1.00	7.29	2.88	7.29
#FFFFFF	7.29	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B5BA1

Deuteranopia (green-blind)

#1B539C

Tritanopia (blue-blind)

#006270

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f519e;
/* rgb */ color: rgb(63, 81, 158);
/* oklch */ color: oklch(46.1% 0.126 270.8);

Tailwind

colors: {
  custom: {
    50: '#7d81bb',
    500: '#3f519e',
    950: '#000000',
  },
}

SCSS

$custom: #3f519e;
$custom-light: #7d81bb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f519e",
  "rgb": {
    "r": 63,
    "g": 81,
    "b": 158
  },
  "hsl": {
    "h": 228.632,
    "s": 42.986,
    "l": 43.333
  },
  "oklch": {
    "l": 0.4613,
    "c": 0.12612,
    "h": 270.8
  },
  "luminance": 0.0941
}

Semantic roles & 50–950 ramp

primary

#3F519E

secondary

#BAAF7F

accent

#BB55D3

background

#F8F7FB

surface

#EFEEF6

border

#CAC9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #3F519E

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

Preview Lab → · Contrast checker → · Palette generator →