#3987BC#3987BC

#3987BC is a mid, moderate cyan. Relative luminance 0.218; OKLCH L 59.9% C 0.111 H 241.8°. Best body text is #000000 at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#3987BC
RGB	rgb(57, 135, 188)
HSL	hsl(204, 53%, 48%)
HSV	hsv(204, 70%, 74%)
CMYK	cmyk(69.7%, 28.2%, 0%, 26.3%)
CIE-LAB	lab(53.84, -6.53, -34.66)
CIE-LCH	lch(53.84, 35.27, 259.33°)
OKLab	oklab(59.88% -0.0525 -0.0978)
OKLCH	oklch(59.88% 0.111 241.8)
XYZ	xyz(19.4249, 21.8265, 50.7564)
Luminance	0.2183 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3987BC #BC6E39

analogous

#39BCAF #3987BC #3945BC

triadic

#3987BC #BC3987 #87BC39

tetradic

#3987BC #AF39BC #BC6E39 #45BC39

square

#3987BC #AF39BC #BC6E39 #45BC39

split-complementary

#3987BC #BC3945 #BCAF39

monochromatic

#1D445E #2B658D #3987BC #63A3D0 #92BFDE

Accessibility & contrast

On white

3.91

#3987BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.37

#3987BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3987BC

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3987BC	#FFFFFF	#000000	##000000
##3987BC	1.00	3.91	5.37	5.37
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.37	21.00	1.00	1.00
##000000	5.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F88BE

Deuteranopia (green-blind)

#5D7BBB

Tritanopia (blue-blind)

#009499

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #3987bc;
/* rgb */ color: rgb(57, 135, 188);
/* oklch */ color: oklch(59.9% 0.111 241.8);

Tailwind

colors: {
  custom: {
    50: '#7fa9d0',
    500: '#3987bc',
    950: '#000000',
  },
}

SCSS

$custom: #3987bc;
$custom-light: #7fa9d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3987bc",
  "rgb": {
    "r": 57,
    "g": 135,
    "b": 188
  },
  "hsl": {
    "h": 204.275,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.59877,
    "c": 0.111,
    "h": 241.8
  },
  "luminance": 0.21829
}

Semantic roles & 50–950 ramp

primary

#3987BC

secondary

#C9A288

accent

#864BDD

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3987BC

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

Preview Lab → · Contrast checker → · Palette generator →