#3F73C0#3F73C0

#3F73C0 is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.7% C 0.132 H 258.1°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F73C0
RGB	rgb(63, 115, 192)
HSL	hsl(216, 51%, 50%)
HSV	hsv(216, 67%, 75%)
CMYK	cmyk(67.2%, 40.1%, 0%, 24.7%)
CIE-LAB	lab(48.41, 7.84, -45.50)
CIE-LCH	lch(48.41, 46.17, 279.77°)
OKLab	oklab(55.75% -0.0272 -0.1296)
OKLCH	oklch(55.75% 0.132 258.1)
XYZ	xyz(17.6916, 17.1222, 52.2315)
Luminance	0.1712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73C0 #C08C3F

analogous

#3FB3C0 #3F73C0 #4C3FC0

triadic

#3F73C0 #C03F73 #73C03F

tetradic

#3F73C0 #C03FB3 #C08C3F #3FC04C

square

#3F73C0 #C03FB3 #C08C3F #3FC04C

split-complementary

#3F73C0 #C04C3F #B3C03F

monochromatic

#213C64 #305792 #3F73C0 #6D95CF #9BB6DE

Accessibility & contrast

On white

4.75

#3F73C0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#3F73C0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F73C0

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73C0	#FFFFFF	#000000	##FFFFFF
##3F73C0	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5079C3

Deuteranopia (green-blind)

#3C6DBE

Tritanopia (blue-blind)

#008590

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f73c0;
/* rgb */ color: rgb(63, 115, 192);
/* oklch */ color: oklch(55.7% 0.132 258.1);

Tailwind

colors: {
  custom: {
    50: '#829ad3',
    500: '#3f73c0',
    950: '#000000',
  },
}

SCSS

$custom: #3f73c0;
$custom-light: #829ad3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73c0",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 192
  },
  "hsl": {
    "h": 215.814,
    "s": 50.588,
    "l": 50
  },
  "oklch": {
    "l": 0.55746,
    "c": 0.13246,
    "h": 258.1
  },
  "luminance": 0.17124
}

Semantic roles & 50–950 ramp

primary

#3F73C0

secondary

#CAB391

accent

#A24EDA

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F73C0

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

Preview Lab → · Contrast checker → · Palette generator →