#3F75C9#3F75C9

#3F75C9 is a mid, vivid blue. Relative luminance 0.180; OKLCH L 56.7% C 0.142 H 259.0°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F75C9
RGB	rgb(63, 117, 201)
HSL	hsl(217, 56%, 52%)
HSV	hsv(217, 69%, 79%)
CMYK	cmyk(68.7%, 41.8%, 0%, 21.2%)
CIE-LAB	lab(49.49, 9.82, -48.95)
CIE-LCH	lch(49.49, 49.93, 281.34°)
OKLab	oklab(56.75% -0.0272 -0.1397)
OKLCH	oklch(56.75% 0.142 259)
XYZ	xyz(18.9500, 17.9944, 57.7216)
Luminance	0.1800 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75C9 #C9933F

analogous

#3FBAC9 #3F75C9 #4E3FC9

triadic

#3F75C9 #C93F75 #75C93F

tetradic

#3F75C9 #C93FBA #C9933F #3FC94E

square

#3F75C9 #C93FBA #C9933F #3FC94E

split-complementary

#3F75C9 #C94E3F #BAC93F

monochromatic

#1F3E6F #2D599E #3F75C9 #6F97D6 #9FBAE4

Accessibility & contrast

On white

4.57

#3F75C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#3F75C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75C9

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75C9	#FFFFFF	#000000	##000000
##3F75C9	1.00	4.57	4.60	4.60
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D7DCC

Deuteranopia (green-blind)

#3770C7

Tritanopia (blue-blind)

#008895

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f75c9;
/* rgb */ color: rgb(63, 117, 201);
/* oklch */ color: oklch(56.7% 0.142 259.0);

Tailwind

colors: {
  custom: {
    50: '#839cda',
    500: '#3f75c9',
    950: '#000000',
  },
}

SCSS

$custom: #3f75c9;
$custom-light: #839cda;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75c9",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 201
  },
  "hsl": {
    "h": 216.522,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.56745,
    "c": 0.14236,
    "h": 259
  },
  "luminance": 0.17996
}

Semantic roles & 50–950 ramp

primary

#3F75C9

secondary

#D0B894

accent

#A448DF

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75C9

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

Preview Lab → · Contrast checker → · Palette generator →