#3F80B3#3F80B3

#3F80B3 is a mid, moderate cyan. Relative luminance 0.198; OKLCH L 58.0% C 0.103 H 244.7°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX#3F80B3
RGBrgb(63, 128, 179)
HSLhsl(206, 48%, 47%)
HSVhsv(206, 65%, 70%)
CMYKcmyk(64.8%, 28.5%, 0%, 29.8%)
CIE-LABlab(51.55, -4.55, -33.07)
CIE-LCHlch(51.55, 33.38, 262.16°)
OKLaboklab(57.99% -0.0441 -0.0932)
OKLCHoklch(57.99% 0.103 244.7)
XYZxyz(17.9027, 19.7480, 45.5073)
Luminance0.1975 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F80B3 #B3723F
analogous
#3FB3AC #3F80B3 #3F46B3
triadic
#3F80B3 #B33F80 #80B33F
tetradic
#3F80B3 #AC3FB3 #B3723F #46B33F
square
#3F80B3 #AC3FB3 #B3723F #46B33F
split-complementary
#3F80B3 #B33F46 #B3AC3F
monochromatic
#1F3F58 #2F6086 #3F80B3 #669EC9 #93BAD9

Accessibility & contrast

On white

4.24
#3F80B3 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

4.95
#3F80B3 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F80B3
4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F80B3#FFFFFF#000000##000000
##3F80B31.004.244.954.95
#FFFFFF4.241.0021.0021.00
#0000004.9521.001.001.00
##0000004.9521.001.001.00

Color blindness preview

Protanopia (red-blind)
#6981B5
Deuteranopia (green-blind)
#5A76B2
Tritanopia (blue-blind)
#008C92
Achromatopsia (no color)
#7B7B7B

Design tokens & code

CSS
--color: #3f80b3;
/* rgb */ color: rgb(63, 128, 179);
/* oklch */ color: oklch(58.0% 0.103 244.7);
Tailwind
colors: {
  custom: {
    50: '#80a4ca',
    500: '#3f80b3',
    950: '#000000',
  },
}
SCSS
$custom: #3f80b3;
$custom-light: #80a4ca;
$custom-dark: #000000;
JSON
{
  "hex": "#3f80b3",
  "rgb": {
    "r": 63,
    "g": 128,
    "b": 179
  },
  "hsl": {
    "h": 206.379,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.57987,
    "c": 0.10312,
    "h": 244.7
  },
  "luminance": 0.1975
}

Semantic roles & 50–950 ramp

primary
#3F80B3
secondary
#C4A389
accent
#8C50D8
background
#F8FAFC
surface
#EFF4F8
border
#CACED1
text
#0B0F13
muted
#7C7F82

Preview Lab

Preview with #3F80B3

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

Preview Lab → · Contrast checker → · Palette generator →

#3F80B3 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva