#3F75BB#3F75BB

#3F75BB is a mid, vivid cyan. Relative luminance 0.174; OKLCH L 55.9% C 0.124 H 255.8°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F75BB
RGB	rgb(63, 117, 187)
HSL	hsl(214, 50%, 49%)
HSV	hsv(214, 66%, 73%)
CMYK	cmyk(66.3%, 37.4%, 0%, 26.7%)
CIE-LAB	lab(48.72, 4.83, -42.14)
CIE-LCH	lch(48.72, 42.42, 276.54°)
OKLab	oklab(55.89% -0.0304 -0.1198)
OKLCH	oklch(55.89% 0.124 255.8)
XYZ	xyz(17.3776, 17.3655, 49.4401)
Luminance	0.1737 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75BB #BB853F

analogous

#3FB3BB #3F75BB #473FBB

triadic

#3F75BB #BB3F75 #75BB3F

tetradic

#3F75BB #BB3FB3 #BB853F #3FBB47

square

#3F75BB #BB3FB3 #BB853F #3FBB47

split-complementary

#3F75BB #BB473F #B3BB3F

monochromatic

#203C5F #30588D #3F75BB #6A95CD #98B6DC

Accessibility & contrast

On white

4.69

#3F75BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3F75BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F75BB

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75BB	#FFFFFF	#000000	##FFFFFF
##3F75BB	1.00	4.69	4.47	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#567ABE

Deuteranopia (green-blind)

#446EBA

Tritanopia (blue-blind)

#00858F

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f75bb;
/* rgb */ color: rgb(63, 117, 187);
/* oklch */ color: oklch(55.9% 0.124 255.8);

Tailwind

colors: {
  custom: {
    50: '#819cd0',
    500: '#3f75bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f75bb;
$custom-light: #819cd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75bb",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 187
  },
  "hsl": {
    "h": 213.871,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.55894,
    "c": 0.12355,
    "h": 255.8
  },
  "luminance": 0.17367
}

Semantic roles & 50–950 ramp

primary

#3F75BB

secondary

#C8AF8E

accent

#9D4FD9

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F75BB

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

Preview Lab → · Contrast checker → · Palette generator →