#3F50C9#3F50C9

#3F50C9 is a mid, vivid blue. Relative luminance 0.110; OKLCH L 49.2% C 0.187 H 271.5°. Best body text is #FFFFFF at 6.56:1 contrast (WCAG AA passes).

Color values

HEX	#3F50C9
RGB	rgb(63, 80, 201)
HSL	hsl(233, 56%, 52%)
HSV	hsv(233, 69%, 79%)
CMYK	cmyk(68.7%, 60.2%, 0%, 21.2%)
CIE-LAB	lab(39.60, 33.28, -64.91)
CIE-LCH	lch(39.60, 72.95, 297.14°)
OKLab	oklab(49.24% 0.0051 -0.1872)
OKLCH	oklch(49.24% 0.187 271.5)
XYZ	xyz(15.4576, 11.0096, 56.5575)
Luminance	0.1101 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50C9 #C9B83F

analogous

#3F95C9 #3F50C9 #733FC9

triadic

#3F50C9 #C93F50 #50C93F

tetradic

#3F50C9 #C93F95 #C9B83F #3FC973

square

#3F50C9 #C93F95 #C9B83F #3FC973

split-complementary

#3F50C9 #C9733F #95C93F

monochromatic

#1F296F #2D3B9E #3F50C9 #6F7CD6 #9FA7E4

Accessibility & contrast

On white

6.56

#3F50C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.20

#3F50C9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F50C9

6.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50C9	#FFFFFF	#000000	##FFFFFF
##3F50C9	1.00	6.56	3.20	6.56
#FFFFFF	6.56	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064CD

Deuteranopia (green-blind)

#0057C7

Tritanopia (blue-blind)

#006E85

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f50c9;
/* rgb */ color: rgb(63, 80, 201);
/* oklch */ color: oklch(49.2% 0.187 271.5);

Tailwind

colors: {
  custom: {
    50: '#8581da',
    500: '#3f50c9',
    950: '#000000',
  },
}

SCSS

$custom: #3f50c9;
$custom-light: #8581da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50c9",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 201
  },
  "hsl": {
    "h": 232.609,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.49237,
    "c": 0.18727,
    "h": 271.5
  },
  "luminance": 0.11011
}

Semantic roles & 50–950 ramp

primary

#3F50C9

secondary

#D0C994

accent

#CD48DF

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F50C9

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

Preview Lab → · Contrast checker → · Palette generator →