#3F6CDD#3F6CDD

#3F6CDD is a mid, vivid blue. Relative luminance 0.170; OKLCH L 56.2% C 0.180 H 264.8°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F6CDD
RGB	rgb(63, 108, 221)
HSL	hsl(223, 70%, 56%)
HSV	hsv(223, 71%, 87%)
CMYK	cmyk(71.5%, 51.1%, 0%, 13.3%)
CIE-LAB	lab(48.26, 22.67, -62.31)
CIE-LCH	lch(48.26, 66.30, 289.99°)
OKLab	oklab(56.2% -0.0162 -0.1792)
OKLCH	oklch(56.2% 0.18 264.8)
XYZ	xyz(20.4590, 17.0002, 70.5957)
Luminance	0.1700 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6CDD #DDB03F

analogous

#3FBBDD #3F6CDD #613FDD

triadic

#3F6CDD #DD3F6C #6CDD3F

tetradic

#3F6CDD #DD3FBB #DDB03F #3FDD61

square

#3F6CDD #DD3FBB #DDB03F #3FDD61

split-complementary

#3F6CDD #DD613F #BBDD3F

monochromatic

#183889 #224EBD #3F6CDD #7394E6 #A7BCEF

Accessibility & contrast

On white

4.77

#3F6CDD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#3F6CDD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6CDD

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6CDD	#FFFFFF	#000000	##FFFFFF
##3F6CDD	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#247AE1

Deuteranopia (green-blind)

#006CDB

Tritanopia (blue-blind)

#00879A

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f6cdd;
/* rgb */ color: rgb(63, 108, 221);
/* oklch */ color: oklch(56.2% 0.180 264.8);

Tailwind

colors: {
  custom: {
    50: '#8795e8',
    500: '#3f6cdd',
    950: '#000000',
  },
}

SCSS

$custom: #3f6cdd;
$custom-light: #8795e8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6cdd",
  "rgb": {
    "r": 63,
    "g": 108,
    "b": 221
  },
  "hsl": {
    "h": 222.911,
    "s": 69.912,
    "l": 55.686
  },
  "oklch": {
    "l": 0.562,
    "c": 0.17989,
    "h": 264.8
  },
  "luminance": 0.17002
}

Semantic roles & 50–950 ramp

primary

#3F6CDD

secondary

#DDCA9B

accent

#BA3BED

background

#F9F9FE

surface

#F1F1FD

border

#CBCBD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3F6CDD

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

Preview Lab → · Contrast checker → · Palette generator →