#3F53C9#3F53C9

#3F53C9 is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.8% C 0.184 H 270.8°. Best body text is #FFFFFF at 6.38:1 contrast (WCAG AA passes).

Color values

HEX	#3F53C9
RGB	rgb(63, 83, 201)
HSL	hsl(231, 56%, 52%)
HSV	hsv(231, 69%, 79%)
CMYK	cmyk(68.7%, 58.7%, 0%, 21.2%)
CIE-LAB	lab(40.34, 31.38, -63.70)
CIE-LCH	lch(40.34, 71.01, 296.23°)
OKLab	oklab(49.79% 0.0027 -0.1836)
OKLCH	oklch(49.79% 0.184 270.8)
XYZ	xyz(15.6822, 11.4588, 56.6323)
Luminance	0.1146 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F53C9 #C9B53F

analogous

#3F98C9 #3F53C9 #703FC9

triadic

#3F53C9 #C93F53 #53C93F

tetradic

#3F53C9 #C93F98 #C9B53F #3FC970

square

#3F53C9 #C93F98 #C9B53F #3FC970

split-complementary

#3F53C9 #C9703F #98C93F

monochromatic

#1F2B6F #2D3D9E #3F53C9 #6F7ED6 #9FA9E4

Accessibility & contrast

On white

6.38

#3F53C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.29

#3F53C9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F53C9

6.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F53C9	#FFFFFF	#000000	##FFFFFF
##3F53C9	1.00	6.38	3.29	6.38
#FFFFFF	6.38	1.00	21.00	1.00
#000000	3.29	21.00	1.00	21.00
##FFFFFF	6.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066CD

Deuteranopia (green-blind)

#0059C7

Tritanopia (blue-blind)

#007086

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3f53c9;
/* rgb */ color: rgb(63, 83, 201);
/* oklch */ color: oklch(49.8% 0.184 270.8);

Tailwind

colors: {
  custom: {
    50: '#8583da',
    500: '#3f53c9',
    950: '#000000',
  },
}

SCSS

$custom: #3f53c9;
$custom-light: #8583da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f53c9",
  "rgb": {
    "r": 63,
    "g": 83,
    "b": 201
  },
  "hsl": {
    "h": 231.304,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.49791,
    "c": 0.18362,
    "h": 270.8
  },
  "luminance": 0.1146
}

Semantic roles & 50–950 ramp

primary

#3F53C9

secondary

#D0C794

accent

#CA48DF

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F53C9

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

Preview Lab → · Contrast checker → · Palette generator →