#3F87BB#3F87BB

#3F87BB is a mid, moderate cyan. Relative luminance 0.220; OKLCH L 60.0% C 0.107 H 242.8°. Best body text is #000000 at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#3F87BB
RGB	rgb(63, 135, 187)
HSL	hsl(205, 50%, 49%)
HSV	hsv(205, 66%, 73%)
CMYK	cmyk(66.3%, 27.8%, 0%, 26.7%)
CIE-LAB	lab(54.00, -5.90, -33.83)
CIE-LCH	lch(54.00, 34.34, 260.10°)
OKLab	oklab(60.04% -0.049 -0.0954)
OKLCH	oklch(60.04% 0.107 242.8)
XYZ	xyz(19.6801, 21.9705, 50.2076)
Luminance	0.2197 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F87BB #BB733F

analogous

#3FBBB1 #3F87BB #3F49BB

triadic

#3F87BB #BB3F87 #87BB3F

tetradic

#3F87BB #B13FBB #BB733F #49BB3F

square

#3F87BB #B13FBB #BB733F #49BB3F

split-complementary

#3F87BB #BB3F49 #BBB13F

monochromatic

#20455F #30668D #3F87BB #6AA4CD #98C0DC

Accessibility & contrast

On white

3.89

#3F87BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.39

#3F87BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F87BB

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F87BB	#FFFFFF	#000000	##000000
##3F87BB	1.00	3.89	5.39	5.39
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.39	21.00	1.00	1.00
##000000	5.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7088BD

Deuteranopia (green-blind)

#5F7CBA

Tritanopia (blue-blind)

#009499

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #3f87bb;
/* rgb */ color: rgb(63, 135, 187);
/* oklch */ color: oklch(60.0% 0.107 242.8);

Tailwind

colors: {
  custom: {
    50: '#81a9cf',
    500: '#3f87bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f87bb;
$custom-light: #81a9cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f87bb",
  "rgb": {
    "r": 63,
    "g": 135,
    "b": 187
  },
  "hsl": {
    "h": 205.161,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.60039,
    "c": 0.10719,
    "h": 242.8
  },
  "luminance": 0.21973
}

Semantic roles & 50–950 ramp

primary

#3F87BB

secondary

#C8A68E

accent

#894FD9

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3F87BB

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

Preview Lab → · Contrast checker → · Palette generator →