#3F6CBF#3F6CBF

#3F6CBF is a mid, vivid blue. Relative luminance 0.155; OKLCH L 54.1% C 0.139 H 261.5°. Best body text is #FFFFFF at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#3F6CBF
RGB	rgb(63, 108, 191)
HSL	hsl(219, 50%, 50%)
HSV	hsv(219, 67%, 75%)
CMYK	cmyk(67%, 43.5%, 0%, 25.1%)
CIE-LAB	lab(46.37, 11.85, -48.19)
CIE-LCH	lch(46.37, 49.63, 283.82°)
OKLab	oklab(54.14% -0.0205 -0.1376)
OKLCH	oklch(54.14% 0.139 261.5)
XYZ	xyz(16.8131, 15.5418, 51.3939)
Luminance	0.1554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6CBF #BF923F

analogous

#3FACBF #3F6CBF #523FBF

triadic

#3F6CBF #BF3F6C #6CBF3F

tetradic

#3F6CBF #BF3FAC #BF923F #3FBF52

square

#3F6CBF #BF3FAC #BF923F #3FBF52

split-complementary

#3F6CBF #BF523F #ACBF3F

monochromatic

#213863 #305291 #3F6CBF #6D8FCF #9BB2DE

Accessibility & contrast

On white

5.11

#3F6CBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.11

#3F6CBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6CBF

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6CBF	#FFFFFF	#000000	##FFFFFF
##3F6CBF	1.00	5.11	4.11	5.11
#FFFFFF	5.11	1.00	21.00	1.00
#000000	4.11	21.00	1.00	21.00
##FFFFFF	5.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4574C2

Deuteranopia (green-blind)

#2F68BD

Tritanopia (blue-blind)

#007F8C

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #3f6cbf;
/* rgb */ color: rgb(63, 108, 191);
/* oklch */ color: oklch(54.1% 0.139 261.5);

Tailwind

colors: {
  custom: {
    50: '#8295d3',
    500: '#3f6cbf',
    950: '#000000',
  },
}

SCSS

$custom: #3f6cbf;
$custom-light: #8295d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6cbf",
  "rgb": {
    "r": 63,
    "g": 108,
    "b": 191
  },
  "hsl": {
    "h": 218.906,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.54144,
    "c": 0.13915,
    "h": 261.5
  },
  "luminance": 0.15543
}

Semantic roles & 50–950 ramp

primary

#3F6CBF

secondary

#CAB590

accent

#A94EDA

background

#F8F9FD

surface

#F0F1FA

border

#CBCBD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #3F6CBF

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

Preview Lab → · Contrast checker → · Palette generator →