#666FC2#666FC2

#666FC2 is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.3% C 0.127 H 276.9°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#666FC2
RGB	rgb(102, 111, 194)
HSL	hsl(234, 43%, 58%)
HSV	hsv(234, 47%, 76%)
CMYK	cmyk(47.4%, 42.8%, 0%, 23.9%)
CIE-LAB	lab(49.60, 19.02, -44.63)
CIE-LCH	lch(49.60, 48.51, 293.08°)
OKLab	oklab(57.27% 0.0153 -0.1264)
OKLCH	oklch(57.27% 0.127 276.9)
XYZ	xyz(20.8985, 18.0876, 53.4185)
Luminance	0.1809 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FC2 #C2B966

analogous

#669DC2 #666FC2 #8B66C2

triadic

#666FC2 #C2666F #6FC266

tetradic

#666FC2 #C2669D #C2B966 #66C28B

square

#666FC2 #C2669D #C2B966 #66C28B

split-complementary

#666FC2 #C28B66 #9DC266

monochromatic

#31397C #434DA8 #666FC2 #9298D3 #BEC1E5

Accessibility & contrast

On white

4.55

#666FC2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#666FC2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FC2

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FC2	#FFFFFF	#000000	##000000
##666FC2	1.00	4.55	4.62	4.62
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E7AC5

Deuteranopia (green-blind)

#4772C0

Tritanopia (blue-blind)

#44808F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666fc2;
/* rgb */ color: rgb(102, 111, 194);
/* oklch */ color: oklch(57.3% 0.127 276.9);

Tailwind

colors: {
  custom: {
    50: '#9798d5',
    500: '#666fc2',
    950: '#000000',
  },
}

SCSS

$custom: #666fc2;
$custom-light: #9798d5;
$custom-dark: #000000;

JSON

{
  "hex": "#666fc2",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 194
  },
  "hsl": {
    "h": 234.13,
    "s": 42.991,
    "l": 58.039
  },
  "oklch": {
    "l": 0.57274,
    "c": 0.1273,
    "h": 276.9
  },
  "luminance": 0.18089
}

Semantic roles & 50–950 ramp

primary

#666FC2

secondary

#D4D1B0

accent

#C655D3

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666FC2

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

Preview Lab → · Contrast checker → · Palette generator →