#3F87CB#3F87CB

#3F87CB is a mid, vivid cyan. Relative luminance 0.227; OKLCH L 60.9% C 0.126 H 249.5°. Best body text is #000000 at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#3F87CB
RGB	rgb(63, 135, 203)
HSL	hsl(209, 57%, 52%)
HSV	hsv(209, 69%, 80%)
CMYK	cmyk(69%, 33.5%, 0%, 20.4%)
CIE-LAB	lab(54.76, -0.38, -41.73)
CIE-LCH	lch(54.76, 41.74, 269.48°)
OKLab	oklab(60.89% -0.0442 -0.1183)
OKLCH	oklch(60.89% 0.126 249.5)
XYZ	xyz(21.4893, 22.6942, 59.7362)
Luminance	0.2270 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F87CB #CB833F

analogous

#3FCBC9 #3F87CB #3F41CB

triadic

#3F87CB #CB3F87 #87CB3F

tetradic

#3F87CB #C93FCB #CB833F #41CB3F

square

#3F87CB #C93FCB #CB833F #41CB3F

split-complementary

#3F87CB #CB3F41 #CBC93F

monochromatic

#1F4971 #2C68A1 #3F87CB #6FA5D8 #9FC3E5

Accessibility & contrast

On white

3.79

#3F87CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.54

#3F87CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F87CB

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F87CB	#FFFFFF	#000000	##000000
##3F87CB	1.00	3.79	5.54	5.54
#FFFFFF	3.79	1.00	21.00	21.00
#000000	5.54	21.00	1.00	1.00
##000000	5.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#698ACE

Deuteranopia (green-blind)

#557DCA

Tritanopia (blue-blind)

#0097A0

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #3f87cb;
/* rgb */ color: rgb(63, 135, 203);
/* oklch */ color: oklch(60.9% 0.126 249.5);

Tailwind

colors: {
  custom: {
    50: '#84a9db',
    500: '#3f87cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f87cb;
$custom-light: #84a9db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f87cb",
  "rgb": {
    "r": 63,
    "g": 135,
    "b": 203
  },
  "hsl": {
    "h": 209.143,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.60887,
    "c": 0.12631,
    "h": 249.5
  },
  "luminance": 0.22697
}

Semantic roles & 50–950 ramp

primary

#3F87CB

secondary

#D1B294

accent

#9247E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3F87CB

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

Preview Lab → · Contrast checker → · Palette generator →