#3F87DB#3F87DB

#3F87DB is a mid, vivid cyan. Relative luminance 0.235; OKLCH L 61.8% C 0.146 H 254.1°. Best body text is #000000 at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#3F87DB
RGB	rgb(63, 135, 219)
HSL	hsl(212, 68%, 55%)
HSV	hsv(212, 71%, 86%)
CMYK	cmyk(71.2%, 38.4%, 0%, 14.1%)
CIE-LAB	lab(55.58, 5.26, -49.45)
CIE-LCH	lch(55.58, 49.73, 276.08°)
OKLab	oklab(61.8% -0.0401 -0.1409)
OKLCH	oklch(61.8% 0.147 254.1)
XYZ	xyz(23.4953, 23.4966, 70.3011)
Luminance	0.2350 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F87DB #DB933F

analogous

#3FD5DB #3F87DB #453FDB

triadic

#3F87DB #DB3F87 #87DB3F

tetradic

#3F87DB #DB3FD5 #DB933F #3FDB45

square

#3F87DB #DB3FD5 #DB933F #3FDB45

split-complementary

#3F87DB #DB453F #D5DB3F

monochromatic

#194C86 #2369BA #3F87DB #73A7E5 #A6C7EE

Accessibility & contrast

On white

3.68

#3F87DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.70

#3F87DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F87DB

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F87DB	#FFFFFF	#000000	##000000
##3F87DB	1.00	3.68	5.70	5.70
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.70	21.00	1.00	1.00
##000000	5.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#608DDE

Deuteranopia (green-blind)

#487FD9

Tritanopia (blue-blind)

#009BA6

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #3f87db;
/* rgb */ color: rgb(63, 135, 219);
/* oklch */ color: oklch(61.8% 0.146 254.1);

Tailwind

colors: {
  custom: {
    50: '#86a9e6',
    500: '#3f87db',
    950: '#000000',
  },
}

SCSS

$custom: #3f87db;
$custom-light: #86a9e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f87db",
  "rgb": {
    "r": 63,
    "g": 135,
    "b": 219
  },
  "hsl": {
    "h": 212.308,
    "s": 68.421,
    "l": 55.294
  },
  "oklch": {
    "l": 0.61802,
    "c": 0.1465,
    "h": 254.1
  },
  "luminance": 0.23499
}

Semantic roles & 50–950 ramp

primary

#3F87DB

secondary

#DCBD9A

accent

#9B3DEB

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0D0F16

muted

#7D7F84

Preview Lab

Preview with #3F87DB

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

Preview Lab → · Contrast checker → · Palette generator →