#3F72CA#3F72CA

#3F72CA is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.2% C 0.147 H 260.5°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3F72CA
RGB	rgb(63, 114, 202)
HSL	hsl(218, 57%, 52%)
HSV	hsv(218, 69%, 79%)
CMYK	cmyk(68.8%, 43.6%, 0%, 20.8%)
CIE-LAB	lab(48.70, 12.04, -50.78)
CIE-LCH	lch(48.70, 52.19, 283.34°)
OKLab	oklab(56.16% -0.0242 -0.1451)
OKLCH	oklch(56.16% 0.147 260.5)
XYZ	xyz(18.7241, 17.3537, 58.2285)
Luminance	0.1736 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72CA #CA973F

analogous

#3FB7CA #3F72CA #523FCA

triadic

#3F72CA #CA3F72 #72CA3F

tetradic

#3F72CA #CA3FB7 #CA973F #3FCA52

square

#3F72CA #CA3FB7 #CA973F #3FCA52

split-complementary

#3F72CA #CA523F #B7CA3F

monochromatic

#1F3D70 #2C57A0 #3F72CA #6F95D7 #9FB8E4

Accessibility & contrast

On white

4.70

#3F72CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3F72CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F72CA

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72CA	#FFFFFF	#000000	##FFFFFF
##3F72CA	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#477BCD

Deuteranopia (green-blind)

#2F6EC8

Tritanopia (blue-blind)

#008694

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f72ca;
/* rgb */ color: rgb(63, 114, 202);
/* oklch */ color: oklch(56.2% 0.147 260.5);

Tailwind

colors: {
  custom: {
    50: '#839adb',
    500: '#3f72ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f72ca;
$custom-light: #839adb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72ca",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 202
  },
  "hsl": {
    "h": 217.986,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.56155,
    "c": 0.14716,
    "h": 260.5
  },
  "luminance": 0.17356
}

Semantic roles & 50–950 ramp

primary

#3F72CA

secondary

#D1BA94

accent

#A848E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F72CA

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

Preview Lab → · Contrast checker → · Palette generator →