#3F74D1#3F74D1

#3F74D1 is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.0% C 0.154 H 260.8°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX#3F74D1
RGBrgb(63, 116, 209)
HSLhsl(218, 61%, 53%)
HSVhsv(218, 70%, 82%)
CMYKcmyk(69.9%, 44.5%, 0%, 18%)
CIE-LABlab(49.68, 13.31, -53.22)
CIE-LCHlch(49.68, 54.86, 284.04°)
OKLaboklab(57.04% -0.0248 -0.1523)
OKLCHoklch(57.04% 0.154 260.8)
XYZxyz(19.7998, 18.1489, 62.7689)
Luminance0.1815 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F74D1 #D19C3F
analogous
#3FBDD1 #3F74D1 #533FD1
triadic
#3F74D1 #D13F74 #74D13F
tetradic
#3F74D1 #D13FBD #D19C3F #3FD153
square
#3F74D1 #D13FBD #D19C3F #3FD153
split-complementary
#3F74D1 #D1533F #BDD13F
monochromatic
#1D3E79 #2958AA #3F74D1 #7098DD #A2BBE9

Accessibility & contrast

On white

4.54
#3F74D1 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

4.63
#3F74D1 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F74D1
4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F74D1#FFFFFF#000000##000000
##3F74D11.004.544.634.63
#FFFFFF4.541.0021.0021.00
#0000004.6321.001.001.00
##0000004.6321.001.001.00

Color blindness preview

Protanopia (red-blind)
#467DD5
Deuteranopia (green-blind)
#2A70CF
Tritanopia (blue-blind)
#008A98
Achromatopsia (no color)
#767676

Design tokens & code

CSS
--color: #3f74d1;
/* rgb */ color: rgb(63, 116, 209);
/* oklch */ color: oklch(57.0% 0.154 260.8);
Tailwind
colors: {
  custom: {
    50: '#859be0',
    500: '#3f74d1',
    950: '#000000',
  },
}
SCSS
$custom: #3f74d1;
$custom-light: #859be0;
$custom-dark: #000000;
JSON
{
  "hex": "#3f74d1",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 209
  },
  "hsl": {
    "h": 218.219,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.5704,
    "c": 0.15428,
    "h": 260.8
  },
  "luminance": 0.18151
}

Semantic roles & 50–950 ramp

primary
#3F74D1
secondary
#D5BE97
accent
#AA43E4
background
#F8F9FD
surface
#F0F2FB
border
#CBCCD4
text
#0C0E15
muted
#7D7E83

Preview Lab

Preview with #3F74D1

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

Preview Lab → · Contrast checker → · Palette generator →

#3F74D1 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva