#3F87CC#3F87CC

#3F87CC is a mid, vivid cyan. Relative luminance 0.227; OKLCH L 60.9% C 0.128 H 249.9°. Best body text is #000000 at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#3F87CC
RGB	rgb(63, 135, 204)
HSL	hsl(209, 58%, 52%)
HSV	hsv(209, 69%, 80%)
CMYK	cmyk(69.1%, 33.8%, 0%, 20%)
CIE-LAB	lab(54.81, -0.03, -42.22)
CIE-LCH	lch(54.81, 42.22, 269.96°)
OKLab	oklab(60.94% -0.0439 -0.1198)
OKLCH	oklch(60.94% 0.128 249.9)
XYZ	xyz(21.6089, 22.7420, 60.3659)
Luminance	0.2274 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F87CC #CC843F

analogous

#3FCCCB #3F87CC #3F40CC

triadic

#3F87CC #CC3F87 #87CC3F

tetradic

#3F87CC #CB3FCC #CC843F #40CC3F

square

#3F87CC #CB3FCC #CC843F #40CC3F

split-complementary

#3F87CC #CC3F40 #CCCB3F

monochromatic

#1E4972 #2B68A3 #3F87CC #6FA5D9 #A0C3E6

Accessibility & contrast

On white

3.78

#3F87CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.55

#3F87CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F87CC

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F87CC	#FFFFFF	#000000	##000000
##3F87CC	1.00	3.78	5.55	5.55
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.55	21.00	1.00	1.00
##000000	5.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#688ACF

Deuteranopia (green-blind)

#547DCB

Tritanopia (blue-blind)

#0097A0

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #3f87cc;
/* rgb */ color: rgb(63, 135, 204);
/* oklch */ color: oklch(60.9% 0.128 249.9);

Tailwind

colors: {
  custom: {
    50: '#84a9dc',
    500: '#3f87cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f87cc;
$custom-light: #84a9dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f87cc",
  "rgb": {
    "r": 63,
    "g": 135,
    "b": 204
  },
  "hsl": {
    "h": 209.362,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.60943,
    "c": 0.12756,
    "h": 249.9
  },
  "luminance": 0.22744
}

Semantic roles & 50–950 ramp

primary

#3F87CC

secondary

#D2B395

accent

#9247E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3F87CC

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

Preview Lab → · Contrast checker → · Palette generator →