#666DF3#666DF3

#666DF3 is a mid, vivid blue. Relative luminance 0.202; OKLCH L 60.1% C 0.197 H 276.4°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX#666DF3
RGBrgb(102, 109, 243)
HSLhsl(237, 85%, 68%)
HSVhsv(237, 58%, 95%)
CMYKcmyk(58%, 55.1%, 0%, 4.7%)
CIE-LABlab(52.10, 35.65, -68.36)
CIE-LCHlch(52.10, 77.09, 297.54°)
OKLaboklab(60.12% 0.0221 -0.1961)
OKLCHoklch(60.12% 0.197 276.4)
XYZxyz(27.1206, 20.2311, 87.2525)
Luminance0.2023 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#666DF3 #F3EC66
analogous
#66B4F3 #666DF3 #A566F3
triadic
#666DF3 #F3666D #6DF366
tetradic
#666DF3 #F366B4 #F3EC66 #66F3A5
square
#666DF3 #F366B4 #F3EC66 #66F3A5
split-complementary
#666DF3 #F3A566 #B4F366
monochromatic
#101ACE #2D37EF #666DF3 #9FA3F7 #D7D9FC

Accessibility & contrast

On white

4.16
#666DF3 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.05
#666DF3 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DF3
5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##666DF3#FFFFFF#000000##000000
##666DF31.004.165.055.05
#FFFFFF4.161.0021.0021.00
#0000005.0521.001.001.00
##0000005.0521.001.001.00

Color blindness preview

Protanopia (red-blind)
#0082F8
Deuteranopia (green-blind)
#0076F0
Tritanopia (blue-blind)
#008CA5
Achromatopsia (no color)
#7C7C7C

Design tokens & code

CSS
--color: #666df3;
/* rgb */ color: rgb(102, 109, 243);
/* oklch */ color: oklch(60.1% 0.197 276.4);
Tailwind
colors: {
  custom: {
    50: '#9d96f8',
    500: '#666df3',
    950: '#000000',
  },
}
SCSS
$custom: #666df3;
$custom-light: #9d96f8;
$custom-dark: #000000;
JSON
{
  "hex": "#666df3",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 243
  },
  "hsl": {
    "h": 237.021,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.60118,
    "c": 0.19734,
    "h": 276.4
  },
  "luminance": 0.20233
}

Semantic roles & 50–950 ramp

primary
#666DF3
secondary
#F0EEC5
accent
#D704E2
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#0F0D17
muted
#7F7E85

Preview Lab

Preview with #666DF3

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

Preview Lab → · Contrast checker → · Palette generator →

#666DF3 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva