#3F6FD9#3F6FD9

#3F6FD9 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.5% C 0.171 H 263.6°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F6FD9
RGB	rgb(63, 111, 217)
HSL	hsl(221, 67%, 55%)
HSV	hsv(221, 71%, 85%)
CMYK	cmyk(71%, 48.8%, 0%, 14.9%)
CIE-LAB	lab(48.80, 19.33, -59.17)
CIE-LCH	lch(48.80, 62.25, 288.10°)
OKLab	oklab(56.53% -0.0192 -0.1699)
OKLCH	oklch(56.53% 0.171 263.6)
XYZ	xyz(20.2543, 17.4333, 67.9297)
Luminance	0.1744 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6FD9 #D9A93F

analogous

#3FBCD9 #3F6FD9 #5C3FD9

triadic

#3F6FD9 #D93F6F #6FD93F

tetradic

#3F6FD9 #D93FBC #D9A93F #3FD95C

square

#3F6FD9 #D93FBC #D9A93F #3FD95C

split-complementary

#3F6FD9 #D95C3F #BCD93F

monochromatic

#1A3B84 #2452B7 #3F6FD9 #7295E3 #A5BCED

Accessibility & contrast

On white

4.68

#3F6FD9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3F6FD9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6FD9

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6FD9	#FFFFFF	#000000	##FFFFFF
##3F6FD9	1.00	4.68	4.49	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#337BDD

Deuteranopia (green-blind)

#006DD7

Tritanopia (blue-blind)

#00889A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f6fd9;
/* rgb */ color: rgb(63, 111, 217);
/* oklch */ color: oklch(56.5% 0.171 263.6);

Tailwind

colors: {
  custom: {
    50: '#8697e5',
    500: '#3f6fd9',
    950: '#000000',
  },
}

SCSS

$custom: #3f6fd9;
$custom-light: #8697e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6fd9",
  "rgb": {
    "r": 63,
    "g": 111,
    "b": 217
  },
  "hsl": {
    "h": 221.299,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.56529,
    "c": 0.17095,
    "h": 263.6
  },
  "luminance": 0.17435
}

Semantic roles & 50–950 ramp

primary

#3F6FD9

secondary

#DAC69A

accent

#B43EEA

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0D16

muted

#7D7E84

Preview Lab

Preview with #3F6FD9

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

Preview Lab → · Contrast checker → · Palette generator →