#3F6CD1#3F6CD1

#3F6CD1 is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.4% C 0.164 H 263.8°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3F6CD1
RGB	rgb(63, 108, 209)
HSL	hsl(222, 61%, 53%)
HSV	hsv(222, 70%, 82%)
CMYK	cmyk(69.9%, 48.3%, 0%, 18%)
CIE-LAB	lab(47.47, 18.33, -56.76)
CIE-LCH	lch(47.47, 59.64, 287.90°)
OKLab	oklab(55.35% -0.0176 -0.1628)
OKLCH	oklch(55.35% 0.164 263.8)
XYZ	xyz(18.9170, 16.3834, 62.4746)
Luminance	0.1638 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6CD1 #D1A43F

analogous

#3FB5D1 #3F6CD1 #5B3FD1

triadic

#3F6CD1 #D13F6C #6CD13F

tetradic

#3F6CD1 #D13FB5 #D1A43F #3FD15B

square

#3F6CD1 #D13FB5 #D1A43F #3FD15B

split-complementary

#3F6CD1 #D15B3F #B5D13F

monochromatic

#1D3979 #2951AA #3F6CD1 #7092DD #A2B8E9

Accessibility & contrast

On white

4.91

#3F6CD1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#3F6CD1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6CD1

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6CD1	#FFFFFF	#000000	##FFFFFF
##3F6CD1	1.00	4.91	4.28	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3478D5

Deuteranopia (green-blind)

#066ACF

Tritanopia (blue-blind)

#008494

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3f6cd1;
/* rgb */ color: rgb(63, 108, 209);
/* oklch */ color: oklch(55.4% 0.164 263.8);

Tailwind

colors: {
  custom: {
    50: '#8595e0',
    500: '#3f6cd1',
    950: '#000000',
  },
}

SCSS

$custom: #3f6cd1;
$custom-light: #8595e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6cd1",
  "rgb": {
    "r": 63,
    "g": 108,
    "b": 209
  },
  "hsl": {
    "h": 221.507,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.5535,
    "c": 0.16376,
    "h": 263.8
  },
  "luminance": 0.16385
}

Semantic roles & 50–950 ramp

primary

#3F6CD1

secondary

#D5C297

accent

#B343E4

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F6CD1

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

Preview Lab → · Contrast checker → · Palette generator →