#3F78D0#3F78D0

#3F78D0 is a mid, vivid blue. Relative luminance 0.190; OKLCH L 57.8% C 0.148 H 258.9°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX#3F78D0
RGBrgb(63, 120, 208)
HSLhsl(216, 61%, 53%)
HSVhsv(216, 70%, 82%)
CMYKcmyk(69.7%, 42.3%, 0%, 18.4%)
CIE-LABlab(50.74, 10.47, -50.95)
CIE-LCHlch(50.74, 52.02, 281.61°)
OKLaboklab(57.84% -0.0286 -0.1456)
OKLCHoklch(57.84% 0.148 258.9)
XYZxyz(20.1474, 19.0417, 62.2759)
Luminance0.1904 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F78D0 #D0973F
analogous
#3FC0D0 #3F78D0 #4E3FD0
triadic
#3F78D0 #D03F78 #78D03F
tetradic
#3F78D0 #D03FC0 #D0973F #3FD04E
square
#3F78D0 #D03FC0 #D0973F #3FD04E
split-complementary
#3F78D0 #D04E3F #C0D03F
monochromatic
#1D4177 #295BA9 #3F78D0 #709BDC #A1BDE8

Accessibility & contrast

On white

4.37
#3F78D0 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

4.81
#3F78D0 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78D0
4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F78D0#FFFFFF#000000##000000
##3F78D01.004.374.814.81
#FFFFFF4.371.0021.0021.00
#0000004.8121.001.001.00
##0000004.8121.001.001.00

Color blindness preview

Protanopia (red-blind)
#4E80D3
Deuteranopia (green-blind)
#3573CE
Tritanopia (blue-blind)
#008C9A
Achromatopsia (no color)
#797979

Design tokens & code

CSS
--color: #3f78d0;
/* rgb */ color: rgb(63, 120, 208);
/* oklch */ color: oklch(57.8% 0.148 258.9);
Tailwind
colors: {
  custom: {
    50: '#849edf',
    500: '#3f78d0',
    950: '#000000',
  },
}
SCSS
$custom: #3f78d0;
$custom-light: #849edf;
$custom-dark: #000000;
JSON
{
  "hex": "#3f78d0",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 208
  },
  "hsl": {
    "h": 216.414,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.57839,
    "c": 0.14835,
    "h": 258.9
  },
  "luminance": 0.19044
}

Semantic roles & 50–950 ramp

primary
#3F78D0
secondary
#D5BC96
accent
#A544E4
background
#F8F9FD
surface
#F0F2FB
border
#CBCCD4
text
#0C0E15
muted
#7D7E83

Preview Lab

Preview with #3F78D0

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

Preview Lab → · Contrast checker → · Palette generator →

#3F78D0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva