#3987B8#3987B8

#3987B8 is a mid, moderate cyan. Relative luminance 0.217; OKLCH L 59.7% C 0.107 H 239.7°. Best body text is #000000 at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#3987B8
RGB	rgb(57, 135, 184)
HSL	hsl(203, 53%, 47%)
HSV	hsv(203, 69%, 72%)
CMYK	cmyk(69%, 26.6%, 0%, 27.8%)
CIE-LAB	lab(53.66, -7.91, -32.65)
CIE-LCH	lch(53.66, 33.60, 256.39°)
OKLab	oklab(59.67% -0.0538 -0.092)
OKLCH	oklch(59.67% 0.107 239.7)
XYZ	xyz(18.9997, 21.6564, 48.5169)
Luminance	0.2166 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3987B8 #B86A39

analogous

#39B8AA #3987B8 #3947B8

triadic

#3987B8 #B83987 #87B839

tetradic

#3987B8 #AA39B8 #B86A39 #47B839

square

#3987B8 #AA39B8 #B86A39 #47B839

split-complementary

#3987B8 #B83947 #B8AA39

monochromatic

#1C425B #2B6589 #3987B8 #60A4CE #8FBFDC

Accessibility & contrast

On white

3.94

#3987B8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.33

#3987B8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3987B8

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3987B8	#FFFFFF	#000000	##000000
##3987B8	1.00	3.94	5.33	5.33
#FFFFFF	3.94	1.00	21.00	21.00
#000000	5.33	21.00	1.00	1.00
##000000	5.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7087BA

Deuteranopia (green-blind)

#5F7BB7

Tritanopia (blue-blind)

#009398

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3987b8;
/* rgb */ color: rgb(57, 135, 184);
/* oklch */ color: oklch(59.7% 0.107 239.7);

Tailwind

colors: {
  custom: {
    50: '#7ea9cd',
    500: '#3987b8',
    950: '#000000',
  },
}

SCSS

$custom: #3987b8;
$custom-light: #7ea9cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3987b8",
  "rgb": {
    "r": 57,
    "g": 135,
    "b": 184
  },
  "hsl": {
    "h": 203.15,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.59673,
    "c": 0.10657,
    "h": 239.7
  },
  "luminance": 0.21658
}

Semantic roles & 50–950 ramp

primary

#3987B8

secondary

#C79F86

accent

#834CDC

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3987B8

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

Preview Lab → · Contrast checker → · Palette generator →