#3F72C1#3F72C1

#3F72C1 is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.6% C 0.135 H 258.9°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#3F72C1
RGB	rgb(63, 114, 193)
HSL	hsl(216, 51%, 50%)
HSV	hsv(216, 67%, 76%)
CMYK	cmyk(67.4%, 40.9%, 0%, 24.3%)
CIE-LAB	lab(48.18, 8.81, -46.45)
CIE-LCH	lch(48.18, 47.27, 280.75°)
OKLab	oklab(55.59% -0.026 -0.1324)
OKLCH	oklch(55.59% 0.135 258.9)
XYZ	xyz(17.6894, 16.9399, 52.7792)
Luminance	0.1694 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72C1 #C18E3F

analogous

#3FB3C1 #3F72C1 #4D3FC1

triadic

#3F72C1 #C13F72 #72C13F

tetradic

#3F72C1 #C13FB3 #C18E3F #3FC14D

square

#3F72C1 #C13FB3 #C18E3F #3FC14D

split-complementary

#3F72C1 #C14D3F #B3C13F

monochromatic

#213B65 #305793 #3F72C1 #6D94D0 #9CB6DF

Accessibility & contrast

On white

4.79

#3F72C1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#3F72C1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F72C1

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72C1	#FFFFFF	#000000	##FFFFFF
##3F72C1	1.00	4.79	4.39	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E79C4

Deuteranopia (green-blind)

#396DBF

Tritanopia (blue-blind)

#008490

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f72c1;
/* rgb */ color: rgb(63, 114, 193);
/* oklch */ color: oklch(55.6% 0.135 258.9);

Tailwind

colors: {
  custom: {
    50: '#829ad4',
    500: '#3f72c1',
    950: '#000000',
  },
}

SCSS

$custom: #3f72c1;
$custom-light: #829ad4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72c1",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 193
  },
  "hsl": {
    "h": 216.462,
    "s": 51.181,
    "l": 50.196
  },
  "oklch": {
    "l": 0.55586,
    "c": 0.13495,
    "h": 258.9
  },
  "luminance": 0.16942
}

Semantic roles & 50–950 ramp

primary

#3F72C1

secondary

#CBB491

accent

#A34DDB

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F72C1

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

Preview Lab → · Contrast checker → · Palette generator →