#3F75BC#3F75BC

#3F75BC is a mid, vivid cyan. Relative luminance 0.174; OKLCH L 56.0% C 0.125 H 256.0°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F75BC
RGB	rgb(63, 117, 188)
HSL	hsl(214, 50%, 49%)
HSV	hsv(214, 66%, 74%)
CMYK	cmyk(66.5%, 37.8%, 0%, 26.3%)
CIE-LAB	lab(48.77, 5.18, -42.63)
CIE-LCH	lch(48.77, 42.95, 276.93°)
OKLab	oklab(55.95% -0.0301 -0.1212)
OKLCH	oklch(55.95% 0.125 256)
XYZ	xyz(17.4850, 17.4084, 50.0059)
Luminance	0.1741 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75BC #BC863F

analogous

#3FB4BC #3F75BC #483FBC

triadic

#3F75BC #BC3F75 #75BC3F

tetradic

#3F75BC #BC3FB4 #BC863F #3FBC48

square

#3F75BC #BC3FB4 #BC863F #3FBC48

split-complementary

#3F75BC #BC483F #B4BC3F

monochromatic

#203C60 #30588E #3F75BC #6B95CD #99B6DD

Accessibility & contrast

On white

4.69

#3F75BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#3F75BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F75BC

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75BC	#FFFFFF	#000000	##FFFFFF
##3F75BC	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#557ABF

Deuteranopia (green-blind)

#436EBB

Tritanopia (blue-blind)

#00858F

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f75bc;
/* rgb */ color: rgb(63, 117, 188);
/* oklch */ color: oklch(56.0% 0.125 256.0);

Tailwind

colors: {
  custom: {
    50: '#819cd0',
    500: '#3f75bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f75bc;
$custom-light: #819cd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75bc",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 188
  },
  "hsl": {
    "h": 214.08,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.55953,
    "c": 0.12489,
    "h": 256
  },
  "luminance": 0.1741
}

Semantic roles & 50–950 ramp

primary

#3F75BC

secondary

#C9AF8E

accent

#9D4ED9

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F75BC

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

Preview Lab → · Contrast checker → · Palette generator →