#666CF5#666CF5

#666CF5 is a mid, highly saturated blue. Relative luminance 0.201; OKLCH L 60.1% C 0.201 H 276.6°. Best body text is #000000 at 5.03:1 contrast (WCAG AA passes).

Color values

HEX	#666CF5
RGB	rgb(102, 108, 245)
HSL	hsl(237, 88%, 68%)
HSV	hsv(237, 58%, 96%)
CMYK	cmyk(58.4%, 55.9%, 0%, 3.9%)
CIE-LAB	lab(52.00, 36.89, -69.64)
CIE-LCH	lch(52.00, 78.80, 297.91°)
OKLab	oklab(60.09% 0.0231 -0.1999)
OKLCH	oklch(60.09% 0.201 276.6)
XYZ	xyz(27.3182, 20.1404, 88.8164)
Luminance	0.2014 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CF5 #F5EF66

analogous

#66B3F5 #666CF5 #A866F5

triadic

#666CF5 #F5666C #6CF566

tetradic

#666CF5 #F566B3 #F5EF66 #66F5A8

square

#666CF5 #F566B3 #F5EF66 #66F5A8

split-complementary

#666CF5 #F5A866 #B3F566

monochromatic

#0E16D3 #2D35F1 #666CF5 #9FA3F9 #D9DAFD

Accessibility & contrast

On white

4.18

#666CF5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.03

#666CF5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CF5

5.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CF5	#FFFFFF	#000000	##000000
##666CF5	1.00	4.18	5.03	5.03
#FFFFFF	4.18	1.00	21.00	21.00
#000000	5.03	21.00	1.00	1.00
##000000	5.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0082FA

Deuteranopia (green-blind)

#0076F2

Tritanopia (blue-blind)

#008CA6

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666cf5;
/* rgb */ color: rgb(102, 108, 245);
/* oklch */ color: oklch(60.1% 0.201 276.6);

Tailwind

colors: {
  custom: {
    50: '#9e96f9',
    500: '#666cf5',
    950: '#000000',
  },
}

SCSS

$custom: #666cf5;
$custom-light: #9e96f9;
$custom-dark: #000000;

JSON

{
  "hex": "#666cf5",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 245
  },
  "hsl": {
    "h": 237.483,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.60085,
    "c": 0.20119,
    "h": 276.6
  },
  "luminance": 0.20142
}

Semantic roles & 50–950 ramp

primary

#666CF5

secondary

#F1EFC6

accent

#DB01E4

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D17

muted

#7F7E85

Preview Lab

Preview with #666CF5

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

Preview Lab → · Contrast checker → · Palette generator →