#3F73CA#3F73CA

#3F73CA is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.4% C 0.146 H 260.1°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3F73CA
RGB	rgb(63, 115, 202)
HSL	hsl(218, 57%, 52%)
HSV	hsv(218, 69%, 79%)
CMYK	cmyk(68.8%, 43.1%, 0%, 20.8%)
CIE-LAB	lab(48.98, 11.42, -50.33)
CIE-LCH	lch(48.98, 51.61, 282.78°)
OKLab	oklab(56.37% -0.0251 -0.1438)
OKLCH	oklch(56.37% 0.146 260.1)
XYZ	xyz(18.8375, 17.5806, 58.2663)
Luminance	0.1758 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73CA #CA963F

analogous

#3FB9CA #3F73CA #513FCA

triadic

#3F73CA #CA3F73 #73CA3F

tetradic

#3F73CA #CA3FB9 #CA963F #3FCA51

square

#3F73CA #CA3FB9 #CA963F #3FCA51

split-complementary

#3F73CA #CA513F #B9CA3F

monochromatic

#1F3D70 #2C57A0 #3F73CA #6F96D7 #9FB9E4

Accessibility & contrast

On white

4.65

#3F73CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3F73CA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F73CA

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73CA	#FFFFFF	#000000	##FFFFFF
##3F73CA	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#497BCD

Deuteranopia (green-blind)

#316EC8

Tritanopia (blue-blind)

#008794

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f73ca;
/* rgb */ color: rgb(63, 115, 202);
/* oklch */ color: oklch(56.4% 0.146 260.1);

Tailwind

colors: {
  custom: {
    50: '#839adb',
    500: '#3f73ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f73ca;
$custom-light: #839adb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73ca",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 202
  },
  "hsl": {
    "h": 217.554,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.56372,
    "c": 0.146,
    "h": 260.1
  },
  "luminance": 0.17582
}

Semantic roles & 50–950 ramp

primary

#3F73CA

secondary

#D1BA94

accent

#A748E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F73CA

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

Preview Lab → · Contrast checker → · Palette generator →