#3F73CE#3F73CE

#3F73CE is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.6% C 0.151 H 260.7°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F73CE
RGB	rgb(63, 115, 206)
HSL	hsl(218, 59%, 53%)
HSV	hsv(218, 69%, 81%)
CMYK	cmyk(69.4%, 44.2%, 0%, 19.2%)
CIE-LAB	lab(49.22, 12.86, -52.24)
CIE-LCH	lch(49.22, 53.80, 283.82°)
OKLab	oklab(56.63% -0.0244 -0.1494)
OKLCH	oklch(56.63% 0.151 260.7)
XYZ	xyz(19.3172, 17.7725, 60.7929)
Luminance	0.1777 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73CE #CE9A3F

analogous

#3FBACE #3F73CE #533FCE

triadic

#3F73CE #CE3F73 #73CE3F

tetradic

#3F73CE #CE3FBA #CE9A3F #3FCE53

square

#3F73CE #CE3FBA #CE9A3F #3FCE53

split-complementary

#3F73CE #CE533F #BACE3F

monochromatic

#1E3D75 #2A57A6 #3F73CE #7097DA #A1BAE7

Accessibility & contrast

On white

4.61

#3F73CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#3F73CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F73CE

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73CE	#FFFFFF	#000000	##FFFFFF
##3F73CE	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#467CD1

Deuteranopia (green-blind)

#2C6FCC

Tritanopia (blue-blind)

#008896

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f73ce;
/* rgb */ color: rgb(63, 115, 206);
/* oklch */ color: oklch(56.6% 0.151 260.7);

Tailwind

colors: {
  custom: {
    50: '#849add',
    500: '#3f73ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f73ce;
$custom-light: #849add;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73ce",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 206
  },
  "hsl": {
    "h": 218.182,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.5663,
    "c": 0.1514,
    "h": 260.7
  },
  "luminance": 0.17774
}

Semantic roles & 50–950 ramp

primary

#3F73CE

secondary

#D3BD95

accent

#A945E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F73CE

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

Preview Lab → · Contrast checker → · Palette generator →