#3F5FB2#3F5FB2

#3F5FB2 is a mid, vivid blue. Relative luminance 0.125; OKLCH L 50.5% C 0.137 H 265.8°. Best body text is #FFFFFF at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#3F5FB2
RGB	rgb(63, 95, 178)
HSL	hsl(223, 48%, 47%)
HSV	hsv(223, 65%, 70%)
CMYK	cmyk(64.6%, 46.6%, 0%, 30.2%)
CIE-LAB	lab(41.93, 15.46, -47.73)
CIE-LCH	lch(41.93, 50.17, 287.95°)
OKLab	oklab(50.48% -0.0099 -0.1364)
OKLCH	oklch(50.48% 0.137 265.8)
XYZ	xyz(14.1752, 12.4542, 43.7677)
Luminance	0.1246 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5FB2 #B2923F

analogous

#3F99B2 #3F5FB2 #583FB2

triadic

#3F5FB2 #B23F5F #5FB23F

tetradic

#3F5FB2 #B23F99 #B2923F #3FB258

square

#3F5FB2 #B23F99 #B2923F #3FB258

split-complementary

#3F5FB2 #B2583F #99B23F

monochromatic

#1F2F58 #2F4785 #3F5FB2 #6681C9 #93A6D9

Accessibility & contrast

On white

6.02

#3F5FB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#3F5FB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5FB2

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5FB2	#FFFFFF	#000000	##FFFFFF
##3F5FB2	1.00	6.02	3.49	6.02
#FFFFFF	6.02	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3668B5

Deuteranopia (green-blind)

#215EB0

Tritanopia (blue-blind)

#007280

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f5fb2;
/* rgb */ color: rgb(63, 95, 178);
/* oklch */ color: oklch(50.5% 0.137 265.8);

Tailwind

colors: {
  custom: {
    50: '#808cc9',
    500: '#3f5fb2',
    950: '#000000',
  },
}

SCSS

$custom: #3f5fb2;
$custom-light: #808cc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5fb2",
  "rgb": {
    "r": 63,
    "g": 95,
    "b": 178
  },
  "hsl": {
    "h": 223.304,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.5048,
    "c": 0.13681,
    "h": 265.8
  },
  "luminance": 0.12456
}

Semantic roles & 50–950 ramp

primary

#3F5FB2

secondary

#C4B489

accent

#B250D7

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3F5FB2

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

Preview Lab → · Contrast checker → · Palette generator →