#3F72D9#3F72D9

#3F72D9 is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.2% C 0.167 H 262.5°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F72D9
RGB	rgb(63, 114, 217)
HSL	hsl(220, 67%, 55%)
HSV	hsv(220, 71%, 85%)
CMYK	cmyk(71%, 47.5%, 0%, 14.9%)
CIE-LAB	lab(49.62, 17.45, -57.86)
CIE-LCH	lch(49.62, 60.43, 286.78°)
OKLab	oklab(57.15% -0.0217 -0.166)
OKLCH	oklch(57.15% 0.167 262.5)
XYZ	xyz(20.5871, 18.0990, 68.0407)
Luminance	0.1810 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72D9 #D9A63F

analogous

#3FBFD9 #3F72D9 #593FD9

triadic

#3F72D9 #D93F72 #72D93F

tetradic

#3F72D9 #D93FBF #D9A63F #3FD959

square

#3F72D9 #D93FBF #D9A63F #3FD959

split-complementary

#3F72D9 #D9593F #BFD93F

monochromatic

#1A3D84 #2455B7 #3F72D9 #7298E3 #A5BDED

Accessibility & contrast

On white

4.55

#3F72D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#3F72D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F72D9

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72D9	#FFFFFF	#000000	##000000
##3F72D9	1.00	4.55	4.62	4.62
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A7DDD

Deuteranopia (green-blind)

#0F6FD7

Tritanopia (blue-blind)

#008A9B

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f72d9;
/* rgb */ color: rgb(63, 114, 217);
/* oklch */ color: oklch(57.2% 0.167 262.5);

Tailwind

colors: {
  custom: {
    50: '#8699e5',
    500: '#3f72d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f72d9;
$custom-light: #8699e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72d9",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 217
  },
  "hsl": {
    "h": 220.13,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.57152,
    "c": 0.16738,
    "h": 262.5
  },
  "luminance": 0.18101
}

Semantic roles & 50–950 ramp

primary

#3F72D9

secondary

#DAC59A

accent

#B13EEA

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0D16

muted

#7D7E84

Preview Lab

Preview with #3F72D9

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

Preview Lab → · Contrast checker → · Palette generator →