#3F72C2#3F72C2

#3F72C2 is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.6% C 0.136 H 259.1°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#3F72C2
RGB	rgb(63, 114, 194)
HSL	hsl(217, 52%, 50%)
HSV	hsv(217, 68%, 76%)
CMYK	cmyk(67.5%, 41.2%, 0%, 23.9%)
CIE-LAB	lab(48.24, 9.17, -46.93)
CIE-LCH	lch(48.24, 47.82, 281.06°)
OKLab	oklab(55.65% -0.0258 -0.1338)
OKLCH	oklch(55.65% 0.136 259.1)
XYZ	xyz(17.8013, 16.9846, 53.3687)
Luminance	0.1699 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72C2 #C28F3F

analogous

#3FB4C2 #3F72C2 #4D3FC2

triadic

#3F72C2 #C23F72 #72C23F

tetradic

#3F72C2 #C23FB4 #C28F3F #3FC24D

square

#3F72C2 #C23FB4 #C28F3F #3FC24D

split-complementary

#3F72C2 #C24D3F #B4C23F

monochromatic

#203C66 #2F5795 #3F72C2 #6D94D1 #9CB6E0

Accessibility & contrast

On white

4.78

#3F72C2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#3F72C2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F72C2

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72C2	#FFFFFF	#000000	##FFFFFF
##3F72C2	1.00	4.78	4.40	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D79C5

Deuteranopia (green-blind)

#386DC0

Tritanopia (blue-blind)

#008490

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f72c2;
/* rgb */ color: rgb(63, 114, 194);
/* oklch */ color: oklch(55.6% 0.136 259.1);

Tailwind

colors: {
  custom: {
    50: '#829ad5',
    500: '#3f72c2',
    950: '#000000',
  },
}

SCSS

$custom: #3f72c2;
$custom-light: #829ad5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72c2",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 194
  },
  "hsl": {
    "h": 216.641,
    "s": 51.779,
    "l": 50.392
  },
  "oklch": {
    "l": 0.55648,
    "c": 0.1363,
    "h": 259.1
  },
  "luminance": 0.16986
}

Semantic roles & 50–950 ramp

primary

#3F72C2

secondary

#CCB591

accent

#A44DDB

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F72C2

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

Preview Lab → · Contrast checker → · Palette generator →