#666EC2#666EC2

#666EC2 is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.1% C 0.129 H 277.4°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#666EC2
RGB	rgb(102, 110, 194)
HSL	hsl(235, 43%, 58%)
HSV	hsv(235, 47%, 76%)
CMYK	cmyk(47.4%, 43.3%, 0%, 23.9%)
CIE-LAB	lab(49.34, 19.63, -45.05)
CIE-LCH	lch(49.34, 49.14, 293.54°)
OKLab	oklab(57.07% 0.0166 -0.1276)
OKLCH	oklch(57.07% 0.129 277.4)
XYZ	xyz(20.7900, 17.8706, 53.3824)
Luminance	0.1787 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EC2 #C2BA66

analogous

#669CC2 #666EC2 #8C66C2

triadic

#666EC2 #C2666E #6EC266

tetradic

#666EC2 #C2669C #C2BA66 #66C28C

square

#666EC2 #C2669C #C2BA66 #66C28C

split-complementary

#666EC2 #C28C66 #9CC266

monochromatic

#31387C #434CA8 #666EC2 #9297D3 #BEC1E5

Accessibility & contrast

On white

4.59

#666EC2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#666EC2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666EC2

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EC2	#FFFFFF	#000000	##FFFFFF
##666EC2	1.00	4.59	4.57	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D79C5

Deuteranopia (green-blind)

#4572C0

Tritanopia (blue-blind)

#44808E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666ec2;
/* rgb */ color: rgb(102, 110, 194);
/* oklch */ color: oklch(57.1% 0.129 277.4);

Tailwind

colors: {
  custom: {
    50: '#9797d5',
    500: '#666ec2',
    950: '#000000',
  },
}

SCSS

$custom: #666ec2;
$custom-light: #9797d5;
$custom-dark: #000000;

JSON

{
  "hex": "#666ec2",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 194
  },
  "hsl": {
    "h": 234.783,
    "s": 42.991,
    "l": 58.039
  },
  "oklch": {
    "l": 0.57073,
    "c": 0.12867,
    "h": 277.4
  },
  "luminance": 0.17872
}

Semantic roles & 50–950 ramp

primary

#666EC2

secondary

#D4D1B0

accent

#C855D3

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666EC2

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

Preview Lab → · Contrast checker → · Palette generator →