#3F539B#3F539B

#3F539B is a mid, moderate blue. Relative luminance 0.096; OKLCH L 46.4% C 0.119 H 269.6°. Best body text is #FFFFFF at 7.19:1 contrast (WCAG AA passes).

Color values

HEX	#3F539B
RGB	rgb(63, 83, 155)
HSL	hsl(227, 42%, 43%)
HSV	hsv(227, 59%, 61%)
CMYK	cmyk(59.4%, 46.5%, 0%, 39.2%)
CIE-LAB	lab(37.13, 15.07, -41.75)
CIE-LCH	lch(37.13, 44.38, 289.85°)
OKLab	oklab(46.35% -0.0008 -0.119)
OKLCH	oklch(46.35% 0.119 269.6)
XYZ	xyz(11.0576, 9.6090, 32.2760)
Luminance	0.0961 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F539B #9B873F

analogous

#3F819B #3F539B #593F9B

triadic

#3F539B #9B3F53 #539B3F

tetradic

#3F539B #9B3F81 #9B873F #3F9B59

square

#3F539B #9B3F81 #9B873F #3F9B59

split-complementary

#3F539B #9B593F #819B3F

monochromatic

#1C2444 #2D3C6F #3F539B #5B70BC #8696CE

Accessibility & contrast

On white

7.19

#3F539B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#3F539B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F539B

7.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F539B	#FFFFFF	#000000	##FFFFFF
##3F539B	1.00	7.19	2.92	7.19
#FFFFFF	7.19	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#325C9E

Deuteranopia (green-blind)

#245499

Tritanopia (blue-blind)

#00636F

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f539b;
/* rgb */ color: rgb(63, 83, 155);
/* oklch */ color: oklch(46.4% 0.119 269.6);

Tailwind

colors: {
  custom: {
    50: '#7c83b9',
    500: '#3f539b',
    950: '#000000',
  },
}

SCSS

$custom: #3f539b;
$custom-light: #7c83b9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f539b",
  "rgb": {
    "r": 63,
    "g": 83,
    "b": 155
  },
  "hsl": {
    "h": 226.957,
    "s": 42.202,
    "l": 42.745
  },
  "oklch": {
    "l": 0.46351,
    "c": 0.11904,
    "h": 269.6
  },
  "luminance": 0.0961
}

Semantic roles & 50–950 ramp

primary

#3F539B

secondary

#B8AC7D

accent

#B756D2

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#0A0A11

muted

#7C7C80

Preview Lab

Preview with #3F539B

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

Preview Lab → · Contrast checker → · Palette generator →