#666DF0#666DF0

#666DF0 is a mid, vivid blue. Relative luminance 0.201; OKLCH L 59.9% C 0.193 H 276.5°. Best body text is #000000 at 5.01:1 contrast (WCAG AA passes).

Color values

HEX	#666DF0
RGB	rgb(102, 109, 240)
HSL	hsl(237, 82%, 67%)
HSV	hsv(237, 58%, 94%)
CMYK	cmyk(57.5%, 54.6%, 0%, 5.9%)
CIE-LAB	lab(51.90, 34.69, -67.01)
CIE-LCH	lch(51.90, 75.46, 297.37°)
OKLab	oklab(59.9% 0.0221 -0.1921)
OKLCH	oklch(59.9% 0.193 276.5)
XYZ	xyz(26.6712, 20.0514, 84.8860)
Luminance	0.2005 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DF0 #F0E966

analogous

#66B2F0 #666DF0 #A466F0

triadic

#666DF0 #F0666D #6DF066

tetradic

#666DF0 #F066B2 #F0E966 #66F0A4

square

#666DF0 #F066B2 #F0E966 #66F0A4

split-complementary

#666DF0 #F0A466 #B2F066

monochromatic

#141DC8 #2E38EB #666DF0 #9EA2F5 #D5D7FB

Accessibility & contrast

On white

4.19

#666DF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.01

#666DF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DF0

5.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DF0	#FFFFFF	#000000	##000000
##666DF0	1.00	4.19	5.01	5.01
#FFFFFF	4.19	1.00	21.00	21.00
#000000	5.01	21.00	1.00	1.00
##000000	5.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0982F4

Deuteranopia (green-blind)

#0076ED

Tritanopia (blue-blind)

#008CA4

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666df0;
/* rgb */ color: rgb(102, 109, 240);
/* oklch */ color: oklch(59.9% 0.193 276.5);

Tailwind

colors: {
  custom: {
    50: '#9d96f6',
    500: '#666df0',
    950: '#000000',
  },
}

SCSS

$custom: #666df0;
$custom-light: #9d96f6;
$custom-dark: #000000;

JSON

{
  "hex": "#666df0",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 240
  },
  "hsl": {
    "h": 236.957,
    "s": 82.143,
    "l": 67.059
  },
  "oklch": {
    "l": 0.59903,
    "c": 0.19339,
    "h": 276.5
  },
  "luminance": 0.20053
}

Semantic roles & 50–950 ramp

primary

#666DF0

secondary

#EFEDC3

accent

#D407DF

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666DF0

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

Preview Lab → · Contrast checker → · Palette generator →