#3F73DE#3F73DE

#3F73DE is a mid, vivid blue. Relative luminance 0.186; OKLCH L 57.7% C 0.173 H 262.7°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3F73DE
RGB	rgb(63, 115, 222)
HSL	hsl(220, 71%, 56%)
HSV	hsv(220, 72%, 87%)
CMYK	cmyk(71.6%, 48.2%, 0%, 12.9%)
CIE-LAB	lab(50.20, 18.63, -59.74)
CIE-LCH	lch(50.20, 62.58, 287.32°)
OKLab	oklab(57.7% -0.0219 -0.1715)
OKLCH	oklch(57.7% 0.173 262.7)
XYZ	xyz(21.3608, 18.5899, 71.5555)
Luminance	0.1859 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73DE #DEAA3F

analogous

#3FC3DE #3F73DE #5A3FDE

triadic

#3F73DE #DE3F73 #73DE3F

tetradic

#3F73DE #DE3FC3 #DEAA3F #3FDE5A

square

#3F73DE #DE3FC3 #DEAA3F #3FDE5A

split-complementary

#3F73DE #DE5A3F #C3DE3F

monochromatic

#183D8B #2155BF #3F73DE #7399E7 #A7BFF0

Accessibility & contrast

On white

4.45

#3F73DE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#3F73DE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F73DE

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73DE	#FFFFFF	#000000	##000000
##3F73DE	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#377FE2

Deuteranopia (green-blind)

#0071DC

Tritanopia (blue-blind)

#008C9E

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f73de;
/* rgb */ color: rgb(63, 115, 222);
/* oklch */ color: oklch(57.7% 0.173 262.7);

Tailwind

colors: {
  custom: {
    50: '#879ae9',
    500: '#3f73de',
    950: '#000000',
  },
}

SCSS

$custom: #3f73de;
$custom-light: #879ae9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73de",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 222
  },
  "hsl": {
    "h": 220.377,
    "s": 70.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.57703,
    "c": 0.17287,
    "h": 262.7
  },
  "luminance": 0.18592
}

Semantic roles & 50–950 ramp

primary

#3F73DE

secondary

#DDC89B

accent

#B33AED

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #3F73DE

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

Preview Lab → · Contrast checker → · Palette generator →