#3F73CD#3F73CD

#3F73CD is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.6% C 0.150 H 260.6°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F73CD
RGB	rgb(63, 115, 205)
HSL	hsl(218, 59%, 53%)
HSV	hsv(218, 69%, 80%)
CMYK	cmyk(69.3%, 43.9%, 0%, 19.6%)
CIE-LAB	lab(49.16, 12.50, -51.77)
CIE-LCH	lch(49.16, 53.25, 283.57°)
OKLab	oklab(56.57% -0.0246 -0.148)
OKLCH	oklch(56.57% 0.15 260.6)
XYZ	xyz(19.1961, 17.7240, 60.1552)
Luminance	0.1773 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73CD #CD993F

analogous

#3FBACD #3F73CD #523FCD

triadic

#3F73CD #CD3F73 #73CD3F

tetradic

#3F73CD #CD3FBA #CD993F #3FCD52

square

#3F73CD #CD3FBA #CD993F #3FCD52

split-complementary

#3F73CD #CD523F #BACD3F

monochromatic

#1E3D74 #2B57A4 #3F73CD #7096DA #A0BAE6

Accessibility & contrast

On white

4.62

#3F73CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#3F73CD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F73CD

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73CD	#FFFFFF	#000000	##FFFFFF
##3F73CD	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#477CD0

Deuteranopia (green-blind)

#2D6FCB

Tritanopia (blue-blind)

#008896

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f73cd;
/* rgb */ color: rgb(63, 115, 205);
/* oklch */ color: oklch(56.6% 0.150 260.6);

Tailwind

colors: {
  custom: {
    50: '#849add',
    500: '#3f73cd',
    950: '#000000',
  },
}

SCSS

$custom: #3f73cd;
$custom-light: #849add;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73cd",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 205
  },
  "hsl": {
    "h": 218.028,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.56565,
    "c": 0.15006,
    "h": 260.6
  },
  "luminance": 0.17726
}

Semantic roles & 50–950 ramp

primary

#3F73CD

secondary

#D3BC95

accent

#A946E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F73CD

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

Preview Lab → · Contrast checker → · Palette generator →