#666FE6#666FE6

#666FE6 is a mid, vivid blue. Relative luminance 0.199; OKLCH L 59.6% C 0.177 H 276.3°. Best body text is #000000 at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#666FE6
RGB	rgb(102, 111, 230)
HSL	hsl(236, 72%, 65%)
HSV	hsv(236, 56%, 90%)
CMYK	cmyk(55.7%, 51.7%, 0%, 9.8%)
CIE-LAB	lab(51.73, 30.30, -61.68)
CIE-LCH	lch(51.73, 68.72, 296.16°)
OKLab	oklab(59.57% 0.0196 -0.1764)
OKLCH	oklch(59.57% 0.178 276.3)
XYZ	xyz(25.4423, 19.9051, 77.3489)
Luminance	0.1991 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FE6 #E6DD66

analogous

#66AFE6 #666FE6 #9D66E6

triadic

#666FE6 #E6666F #6FE666

tetradic

#666FE6 #E666AF #E6DD66 #66E69D

square

#666FE6 #E666AF #E6DD66 #66E69D

split-complementary

#666FE6 #E69D66 #AFE666

monochromatic

#1D28B4 #313DDD #666FE6 #9BA1EF #CFD2F7

Accessibility & contrast

On white

4.22

#666FE6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.98

#666FE6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FE6

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FE6	#FFFFFF	#000000	##000000
##666FE6	1.00	4.22	4.98	4.98
#FFFFFF	4.22	1.00	21.00	21.00
#000000	4.98	21.00	1.00	1.00
##000000	4.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C81EA

Deuteranopia (green-blind)

#1076E3

Tritanopia (blue-blind)

#1E8AA0

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #666fe6;
/* rgb */ color: rgb(102, 111, 230);
/* oklch */ color: oklch(59.6% 0.177 276.3);

Tailwind

colors: {
  custom: {
    50: '#9b98ef',
    500: '#666fe6',
    950: '#000000',
  },
}

SCSS

$custom: #666fe6;
$custom-light: #9b98ef;
$custom-dark: #000000;

JSON

{
  "hex": "#666fe6",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 230
  },
  "hsl": {
    "h": 235.781,
    "s": 71.91,
    "l": 65.098
  },
  "oklch": {
    "l": 0.59571,
    "c": 0.1775,
    "h": 276.3
  },
  "luminance": 0.19907
}

Semantic roles & 50–950 ramp

primary

#666FE6

secondary

#EAE7BE

accent

#C612D4

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666FE6

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

Preview Lab → · Contrast checker → · Palette generator →