#3990DD#3990DD

#3990DD is a light, vivid cyan. Relative luminance 0.260; OKLCH L 63.7% C 0.142 H 248.8°. Best body text is #000000 at 6.21:1 contrast (WCAG AA passes).

Color values

HEX#3990DD
RGBrgb(57, 144, 221)
HSLhsl(208, 71%, 55%)
HSVhsv(208, 74%, 87%)
CMYKcmyk(74.2%, 34.8%, 0%, 13.3%)
CIE-LABlab(58.07, -0.16, -46.63)
CIE-LCHlch(58.07, 46.63, 269.80°)
OKLaboklab(63.73% -0.0514 -0.1326)
OKLCHoklch(63.73% 0.142 248.8)
XYZxyz(24.7068, 26.0340, 72.1155)
Luminance0.2604 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3990DD #DD8639
analogous
#39DDD8 #3990DD #393EDD
triadic
#3990DD #DD3990 #90DD39
tetradic
#3990DD #D839DD #DD8639 #3EDD39
square
#3990DD #D839DD #DD8639 #3EDD39
split-complementary
#3990DD #DD393E #DDD839
monochromatic
#175185 #2071B9 #3990DD #6DADE6 #A1CBEF

Accessibility & contrast

On white

3.38
#3990DD on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.21
#3990DD on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3990DD
6.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3990DD#FFFFFF#000000##000000
##3990DD1.003.386.216.21
#FFFFFF3.381.0021.0021.00
#0000006.2121.001.001.00
##0000006.2121.001.001.00

Color blindness preview

Protanopia (red-blind)
#6D94E0
Deuteranopia (green-blind)
#5585DC
Tritanopia (blue-blind)
#00A2AC
Achromatopsia (no color)
#8C8C8C

Design tokens & code

CSS
--color: #3990dd;
/* rgb */ color: rgb(57, 144, 221);
/* oklch */ color: oklch(63.7% 0.142 248.8);
Tailwind
colors: {
  custom: {
    50: '#84b0e8',
    500: '#3990dd',
    950: '#000000',
  },
}
SCSS
$custom: #3990dd;
$custom-light: #84b0e8;
$custom-dark: #000000;
JSON
{
  "hex": "#3990dd",
  "rgb": {
    "r": 57,
    "g": 144,
    "b": 221
  },
  "hsl": {
    "h": 208.171,
    "s": 70.69,
    "l": 54.51
  },
  "oklch": {
    "l": 0.63732,
    "c": 0.1422,
    "h": 248.8
  },
  "luminance": 0.26037
}

Semantic roles & 50–950 ramp

primary
#3990DD
secondary
#DCB796
accent
#8E3AED
background
#F8FAFE
surface
#F0F4FC
border
#CBCED5
text
#0C1016
muted
#7D7F84

Preview Lab

Preview with #3990DD

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

Preview Lab → · Contrast checker → · Palette generator →

#3990DD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva