#665BF1#665BF1

#665BF1 is a mid, highly saturated blue. Relative luminance 0.167; OKLCH L 56.9% C 0.217 H 280.3°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX#665BF1
RGBrgb(102, 91, 241)
HSLhsl(244, 84%, 65%)
HSVhsv(244, 62%, 95%)
CMYKcmyk(57.7%, 62.2%, 0%, 5.5%)
CIE-LABlab(47.82, 45.65, -74.18)
CIE-LCHlch(47.82, 87.10, 301.61°)
OKLaboklab(56.92% 0.0387 -0.2133)
OKLCHoklch(56.92% 0.217 280.3)
XYZxyz(25.0928, 16.6561, 85.0947)
Luminance0.1666 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#665BF1 #E6F15B
analogous
#5B9BF1 #665BF1 #B15BF1
triadic
#665BF1 #F1665B #5BF166
tetradic
#665BF1 #F15B9B #E6F15B #5BF1B1
square
#665BF1 #F15B9B #E6F15B #5BF1B1
split-complementary
#665BF1 #F1B15B #9BF15B
monochromatic
#1D10C1 #3123EC #665BF1 #9B93F6 #CFCCFB

Accessibility & contrast

On white

4.85
#665BF1 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

4.33
#665BF1 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BF1
4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##665BF1#FFFFFF#000000##FFFFFF
##665BF11.004.854.334.85
#FFFFFF4.851.0021.001.00
#0000004.3321.001.0021.00
##FFFFFF4.851.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0077F6
Deuteranopia (green-blind)
#006CEE
Tritanopia (blue-blind)
#05809E
Achromatopsia (no color)
#717171

Design tokens & code

CSS
--color: #665bf1;
/* rgb */ color: rgb(102, 91, 241);
/* oklch */ color: oklch(56.9% 0.217 280.3);
Tailwind
colors: {
  custom: {
    50: '#9e8af7',
    500: '#665bf1',
    950: '#000000',
  },
}
SCSS
$custom: #665bf1;
$custom-light: #9e8af7;
$custom-dark: #000000;
JSON
{
  "hex": "#665bf1",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 241
  },
  "hsl": {
    "h": 244.4,
    "s": 84.27,
    "l": 65.098
  },
  "oklch": {
    "l": 0.56919,
    "c": 0.2168,
    "h": 280.3
  },
  "luminance": 0.16658
}

Semantic roles & 50–950 ramp

primary
#665BF1
secondary
#EAEDBA
accent
#E105D1
background
#FAF8FF
surface
#F4F0FF
border
#CECBD7
text
#100C17
muted
#7F7D85

Preview Lab

Preview with #665BF1

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

Preview Lab → · Contrast checker → · Palette generator →

#665BF1 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva