#3F87B3#3F87B3

#3F87B3 is a mid, moderate cyan. Relative luminance 0.216; OKLCH L 59.6% C 0.098 H 238.3°. Best body text is #000000 at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#3F87B3
RGB	rgb(63, 135, 179)
HSL	hsl(203, 48%, 47%)
HSV	hsv(203, 65%, 70%)
CMYK	cmyk(64.8%, 24.6%, 0%, 29.8%)
CIE-LAB	lab(53.64, -8.60, -29.81)
CIE-LCH	lch(53.64, 31.02, 253.90°)
OKLab	oklab(59.64% -0.0516 -0.0837)
OKLCH	oklch(59.64% 0.098 238.3)
XYZ	xyz(18.8474, 21.6375, 45.8223)
Luminance	0.2164 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F87B3 #B36B3F

analogous

#3FB3A5 #3F87B3 #3F4DB3

triadic

#3F87B3 #B33F87 #87B33F

tetradic

#3F87B3 #A53FB3 #B36B3F #4DB33F

square

#3F87B3 #A53FB3 #B36B3F #4DB33F

split-complementary

#3F87B3 #B33F4D #B3A53F

monochromatic

#1F4358 #2F6586 #3F87B3 #66A4C9 #93BFD9

Accessibility & contrast

On white

3.94

#3F87B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.33

#3F87B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F87B3

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F87B3	#FFFFFF	#000000	##000000
##3F87B3	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)

#7387B5

Deuteranopia (green-blind)

#637BB2

Tritanopia (blue-blind)

#009296

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3f87b3;
/* rgb */ color: rgb(63, 135, 179);
/* oklch */ color: oklch(59.6% 0.098 238.3);

Tailwind

colors: {
  custom: {
    50: '#80a9ca',
    500: '#3f87b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f87b3;
$custom-light: #80a9ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f87b3",
  "rgb": {
    "r": 63,
    "g": 135,
    "b": 179
  },
  "hsl": {
    "h": 202.759,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.5964,
    "c": 0.09836,
    "h": 238.3
  },
  "luminance": 0.21639
}

Semantic roles & 50–950 ramp

primary

#3F87B3

secondary

#C4A089

accent

#8450D8

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3F87B3

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

Preview Lab → · Contrast checker → · Palette generator →