#666DF5#666DF5

#666DF5 is a mid, vivid blue. Relative luminance 0.204; OKLCH L 60.3% C 0.200 H 276.4°. Best body text is #000000 at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#666DF5
RGB	rgb(102, 109, 245)
HSL	hsl(237, 88%, 68%)
HSV	hsv(237, 58%, 96%)
CMYK	cmyk(58.4%, 55.5%, 0%, 3.9%)
CIE-LAB	lab(52.23, 36.29, -69.25)
CIE-LCH	lch(52.23, 78.18, 297.65°)
OKLab	oklab(60.26% 0.0222 -0.1987)
OKLCH	oklch(60.26% 0.2 276.4)
XYZ	xyz(27.4242, 20.3526, 88.8518)
Luminance	0.2036 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DF5 #F5EE66

analogous

#66B4F5 #666DF5 #A666F5

triadic

#666DF5 #F5666D #6DF566

tetradic

#666DF5 #F566B4 #F5EE66 #66F5A6

square

#666DF5 #F566B4 #F5EE66 #66F5A6

split-complementary

#666DF5 #F5A666 #B4F566

monochromatic

#0E17D3 #2D36F1 #666DF5 #9FA4F9 #D9DBFD

Accessibility & contrast

On white

4.14

#666DF5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.07

#666DF5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DF5

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DF5	#FFFFFF	#000000	##000000
##666DF5	1.00	4.14	5.07	5.07
#FFFFFF	4.14	1.00	21.00	21.00
#000000	5.07	21.00	1.00	1.00
##000000	5.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0083FA

Deuteranopia (green-blind)

#0077F2

Tritanopia (blue-blind)

#008DA6

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #666df5;
/* rgb */ color: rgb(102, 109, 245);
/* oklch */ color: oklch(60.3% 0.200 276.4);

Tailwind

colors: {
  custom: {
    50: '#9e97f9',
    500: '#666df5',
    950: '#000000',
  },
}

SCSS

$custom: #666df5;
$custom-light: #9e97f9;
$custom-dark: #000000;

JSON

{
  "hex": "#666df5",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 245
  },
  "hsl": {
    "h": 237.063,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.60263,
    "c": 0.19995,
    "h": 276.4
  },
  "luminance": 0.20355
}

Semantic roles & 50–950 ramp

primary

#666DF5

secondary

#F1EFC6

accent

#D901E4

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D17

muted

#7F7E85

Preview Lab

Preview with #666DF5

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

Preview Lab → · Contrast checker → · Palette generator →