#3F6FBF#3F6FBF

#3F6FBF is a mid, vivid blue. Relative luminance 0.162; OKLCH L 54.8% C 0.136 H 260.0°. Best body text is #FFFFFF at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#3F6FBF
RGB	rgb(63, 111, 191)
HSL	hsl(218, 50%, 50%)
HSV	hsv(218, 67%, 75%)
CMYK	cmyk(67%, 41.9%, 0%, 25.1%)
CIE-LAB	lab(47.22, 9.97, -46.83)
CIE-LCH	lch(47.22, 47.88, 282.02°)
OKLab	oklab(54.8% -0.0235 -0.1336)
OKLCH	oklch(54.8% 0.136 260)
XYZ	xyz(17.1350, 16.1855, 51.5012)
Luminance	0.1619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6FBF #BF8F3F

analogous

#3FAFBF #3F6FBF #4F3FBF

triadic

#3F6FBF #BF3F6F #6FBF3F

tetradic

#3F6FBF #BF3FAF #BF8F3F #3FBF4F

square

#3F6FBF #BF3FAF #BF8F3F #3FBF4F

split-complementary

#3F6FBF #BF4F3F #AFBF3F

monochromatic

#213A63 #305491 #3F6FBF #6D91CF #9BB4DE

Accessibility & contrast

On white

4.96

#3F6FBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.24

#3F6FBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6FBF

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6FBF	#FFFFFF	#000000	##FFFFFF
##3F6FBF	1.00	4.96	4.24	4.96
#FFFFFF	4.96	1.00	21.00	1.00
#000000	4.24	21.00	1.00	21.00
##FFFFFF	4.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A76C2

Deuteranopia (green-blind)

#366ABD

Tritanopia (blue-blind)

#00818E

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3f6fbf;
/* rgb */ color: rgb(63, 111, 191);
/* oklch */ color: oklch(54.8% 0.136 260.0);

Tailwind

colors: {
  custom: {
    50: '#8297d3',
    500: '#3f6fbf',
    950: '#000000',
  },
}

SCSS

$custom: #3f6fbf;
$custom-light: #8297d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6fbf",
  "rgb": {
    "r": 63,
    "g": 111,
    "b": 191
  },
  "hsl": {
    "h": 217.5,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.54801,
    "c": 0.13565,
    "h": 260
  },
  "luminance": 0.16187
}

Semantic roles & 50–950 ramp

primary

#3F6FBF

secondary

#CAB490

accent

#A54EDA

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3F6FBF

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

Preview Lab → · Contrast checker → · Palette generator →