#3F6FBB#3F6FBB

#3F6FBB is a mid, vivid blue. Relative luminance 0.160; OKLCH L 54.6% C 0.130 H 259.2°. Best body text is #FFFFFF at 5.00:1 contrast (WCAG AA passes).

Color values

HEX	#3F6FBB
RGB	rgb(63, 111, 187)
HSL	hsl(217, 50%, 49%)
HSV	hsv(217, 66%, 73%)
CMYK	cmyk(66.3%, 40.6%, 0%, 26.7%)
CIE-LAB	lab(46.99, 8.54, -44.88)
CIE-LCH	lch(46.99, 45.69, 280.77°)
OKLab	oklab(54.55% -0.0243 -0.1279)
OKLCH	oklch(54.55% 0.13 259.2)
XYZ	xyz(16.7008, 16.0119, 49.2145)
Luminance	0.1601 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6FBB #BB8B3F

analogous

#3FADBB #3F6FBB #4D3FBB

triadic

#3F6FBB #BB3F6F #6FBB3F

tetradic

#3F6FBB #BB3FAD #BB8B3F #3FBB4D

square

#3F6FBB #BB3FAD #BB8B3F #3FBB4D

split-complementary

#3F6FBB #BB4D3F #ADBB3F

monochromatic

#20395F #30548D #3F6FBB #6A90CD #98B2DC

Accessibility & contrast

On white

5.00

#3F6FBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.20

#3F6FBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6FBB

5.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6FBB	#FFFFFF	#000000	##FFFFFF
##3F6FBB	1.00	5.00	4.20	5.00
#FFFFFF	5.00	1.00	21.00	1.00
#000000	4.20	21.00	1.00	21.00
##FFFFFF	5.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C76BE

Deuteranopia (green-blind)

#3A6AB9

Tritanopia (blue-blind)

#00808C

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #3f6fbb;
/* rgb */ color: rgb(63, 111, 187);
/* oklch */ color: oklch(54.6% 0.130 259.2);

Tailwind

colors: {
  custom: {
    50: '#8197d0',
    500: '#3f6fbb',
    950: '#000000',
  },
}

SCSS

$custom: #3f6fbb;
$custom-light: #8197d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6fbb",
  "rgb": {
    "r": 63,
    "g": 111,
    "b": 187
  },
  "hsl": {
    "h": 216.774,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.54551,
    "c": 0.13017,
    "h": 259.2
  },
  "luminance": 0.16013
}

Semantic roles & 50–950 ramp

primary

#3F6FBB

secondary

#C8B18E

accent

#A44FD9

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3F6FBB

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

Preview Lab → · Contrast checker → · Palette generator →