#3987CC#3987CC

#3987CC is a mid, vivid cyan. Relative luminance 0.226; OKLCH L 60.7% C 0.130 H 248.5°. Best body text is #000000 at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#3987CC
RGB	rgb(57, 135, 204)
HSL	hsl(208, 59%, 51%)
HSV	hsv(208, 72%, 80%)
CMYK	cmyk(72.1%, 33.8%, 0%, 20%)
CIE-LAB	lab(54.61, -0.91, -42.54)
CIE-LCH	lch(54.61, 42.55, 268.77°)
OKLab	oklab(60.73% -0.0477 -0.1208)
OKLCH	oklch(60.73% 0.13 248.5)
XYZ	xyz(21.2463, 22.5551, 60.3489)
Luminance	0.2256 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3987CC #CC7E39

analogous

#39CCC7 #3987CC #393DCC

triadic

#3987CC #CC3987 #87CC39

tetradic

#3987CC #C739CC #CC7E39 #3DCC39

square

#3987CC #C739CC #CC7E39 #3DCC39

split-complementary

#3987CC #CC393D #CCC739

monochromatic

#1C486E #29689F #3987CC #6AA4D9 #9AC2E5

Accessibility & contrast

On white

3.81

#3987CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.51

#3987CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3987CC

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3987CC	#FFFFFF	#000000	##000000
##3987CC	1.00	3.81	5.51	5.51
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.51	21.00	1.00	1.00
##000000	5.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#688ACF

Deuteranopia (green-blind)

#537CCB

Tritanopia (blue-blind)

#0097A0

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #3987cc;
/* rgb */ color: rgb(57, 135, 204);
/* oklch */ color: oklch(60.7% 0.130 248.5);

Tailwind

colors: {
  custom: {
    50: '#81a9dc',
    500: '#3987cc',
    950: '#000000',
  },
}

SCSS

$custom: #3987cc;
$custom-light: #81a9dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3987cc",
  "rgb": {
    "r": 57,
    "g": 135,
    "b": 204
  },
  "hsl": {
    "h": 208.163,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.60735,
    "c": 0.12984,
    "h": 248.5
  },
  "luminance": 0.22557
}

Semantic roles & 50–950 ramp

primary

#3987CC

secondary

#D1AE90

accent

#8F46E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3987CC

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

Preview Lab → · Contrast checker → · Palette generator →