#3987C9#3987C9

#3987C9 is a mid, vivid cyan. Relative luminance 0.224; OKLCH L 60.6% C 0.126 H 247.4°. Best body text is #000000 at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#3987C9
RGB	rgb(57, 135, 201)
HSL	hsl(208, 57%, 51%)
HSV	hsv(208, 72%, 79%)
CMYK	cmyk(71.6%, 32.8%, 0%, 21.2%)
CIE-LAB	lab(54.46, -1.97, -41.08)
CIE-LCH	lch(54.46, 41.13, 267.25°)
OKLab	oklab(60.57% -0.0485 -0.1165)
OKLCH	oklch(60.57% 0.126 247.4)
XYZ	xyz(20.8899, 22.4125, 58.4721)
Luminance	0.2241 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3987C9 #C97B39

analogous

#39C9C3 #3987C9 #393FC9

triadic

#3987C9 #C93987 #87C939

tetradic

#3987C9 #C339C9 #C97B39 #3FC939

square

#3987C9 #C339C9 #C97B39 #3FC939

split-complementary

#3987C9 #C9393F #C9C339

monochromatic

#1D476B #2A679B #3987C9 #69A4D6 #99C1E3

Accessibility & contrast

On white

3.83

#3987C9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.48

#3987C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3987C9

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3987C9	#FFFFFF	#000000	##000000
##3987C9	1.00	3.83	5.48	5.48
#FFFFFF	3.83	1.00	21.00	21.00
#000000	5.48	21.00	1.00	1.00
##000000	5.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#698ACC

Deuteranopia (green-blind)

#557CC8

Tritanopia (blue-blind)

#00979F

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #3987c9;
/* rgb */ color: rgb(57, 135, 201);
/* oklch */ color: oklch(60.6% 0.126 247.4);

Tailwind

colors: {
  custom: {
    50: '#81a9da',
    500: '#3987c9',
    950: '#000000',
  },
}

SCSS

$custom: #3987c9;
$custom-light: #81a9da;
$custom-dark: #000000;

JSON

{
  "hex": "#3987c9",
  "rgb": {
    "r": 57,
    "g": 135,
    "b": 201
  },
  "hsl": {
    "h": 207.5,
    "s": 57.143,
    "l": 50.588
  },
  "oklch": {
    "l": 0.60569,
    "c": 0.1262,
    "h": 247.4
  },
  "luminance": 0.22415
}

Semantic roles & 50–950 ramp

primary

#3987C9

secondary

#CFAC8F

accent

#8E47E0

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3987C9

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

Preview Lab → · Contrast checker → · Palette generator →