#3F529E#3F529E

#3F529E is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.3% C 0.125 H 270.4°. Best body text is #FFFFFF at 7.21:1 contrast (WCAG AA passes).

Color values

HEX	#3F529E
RGB	rgb(63, 82, 158)
HSL	hsl(228, 43%, 43%)
HSV	hsv(228, 60%, 62%)
CMYK	cmyk(60.1%, 48.1%, 0%, 38%)
CIE-LAB	lab(37.04, 16.78, -43.70)
CIE-LCH	lch(37.04, 46.81, 291.01°)
OKLab	oklab(46.34% 0.0008 -0.1248)
OKLCH	oklch(46.34% 0.125 270.4)
XYZ	xyz(11.2367, 9.5591, 33.5941)
Luminance	0.0956 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F529E #9E8B3F

analogous

#3F819E #3F529E #5B3F9E

triadic

#3F529E #9E3F52 #529E3F

tetradic

#3F529E #9E3F81 #9E8B3F #3F9E5B

square

#3F529E #9E3F81 #9E8B3F #3F9E5B

split-complementary

#3F529E #9E5B3F #819E3F

monochromatic

#1C2546 #2E3B72 #3F529E #5C70BE #8896D0

Accessibility & contrast

On white

7.21

#3F529E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#3F529E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F529E

7.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F529E	#FFFFFF	#000000	##FFFFFF
##3F529E	1.00	7.21	2.91	7.21
#FFFFFF	7.21	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D5CA1

Deuteranopia (green-blind)

#1E539C

Tritanopia (blue-blind)

#006370

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f529e;
/* rgb */ color: rgb(63, 82, 158);
/* oklch */ color: oklch(46.3% 0.125 270.4);

Tailwind

colors: {
  custom: {
    50: '#7d82bb',
    500: '#3f529e',
    950: '#000000',
  },
}

SCSS

$custom: #3f529e;
$custom-light: #7d82bb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f529e",
  "rgb": {
    "r": 63,
    "g": 82,
    "b": 158
  },
  "hsl": {
    "h": 228,
    "s": 42.986,
    "l": 43.333
  },
  "oklch": {
    "l": 0.46342,
    "c": 0.12478,
    "h": 270.4
  },
  "luminance": 0.0956
}

Semantic roles & 50–950 ramp

primary

#3F529E

secondary

#BAAE7F

accent

#BA55D3

background

#F8F7FB

surface

#EFEEF6

border

#CAC9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #3F529E

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

Preview Lab → · Contrast checker → · Palette generator →