#666EE8#666EE8

#666EE8 is a mid, vivid blue. Relative luminance 0.198; OKLCH L 59.5% C 0.181 H 276.6°. Best body text is #000000 at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#666EE8
RGB	rgb(102, 110, 232)
HSL	hsl(236, 74%, 65%)
HSV	hsv(236, 56%, 91%)
CMYK	cmyk(56%, 52.6%, 0%, 9%)
CIE-LAB	lab(51.61, 31.54, -62.99)
CIE-LCH	lch(51.61, 70.45, 296.60°)
OKLab	oklab(59.52% 0.0207 -0.1803)
OKLCH	oklch(59.52% 0.181 276.6)
XYZ	xyz(25.6162, 19.8010, 78.8004)
Luminance	0.1980 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EE8 #E8E066

analogous

#66AFE8 #666EE8 #9F66E8

triadic

#666EE8 #E8666E #6EE866

tetradic

#666EE8 #E866AF #E8E066 #66E89F

square

#666EE8 #E866AF #E8E066 #66E89F

split-complementary

#666EE8 #E89F66 #AFE866

monochromatic

#1C25B8 #313CE0 #666EE8 #9BA0F0 #D0D3F8

Accessibility & contrast

On white

4.23

#666EE8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.96

#666EE8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EE8

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EE8	#FFFFFF	#000000	##000000
##666EE8	1.00	4.23	4.96	4.96
#FFFFFF	4.23	1.00	21.00	21.00
#000000	4.96	21.00	1.00	1.00
##000000	4.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2681EC

Deuteranopia (green-blind)

#0076E5

Tritanopia (blue-blind)

#1A8AA0

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #666ee8;
/* rgb */ color: rgb(102, 110, 232);
/* oklch */ color: oklch(59.5% 0.181 276.6);

Tailwind

colors: {
  custom: {
    50: '#9c97f0',
    500: '#666ee8',
    950: '#000000',
  },
}

SCSS

$custom: #666ee8;
$custom-light: #9c97f0;
$custom-dark: #000000;

JSON

{
  "hex": "#666ee8",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 232
  },
  "hsl": {
    "h": 236.308,
    "s": 73.864,
    "l": 65.49
  },
  "oklch": {
    "l": 0.59523,
    "c": 0.18149,
    "h": 276.6
  },
  "luminance": 0.19803
}

Semantic roles & 50–950 ramp

primary

#666EE8

secondary

#EBE8BF

accent

#CA10D6

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666EE8

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

Preview Lab → · Contrast checker → · Palette generator →