#666EC0#666EC0

#666EC0 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 57.0% C 0.126 H 277.4°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#666EC0
RGB	rgb(102, 110, 192)
HSL	hsl(235, 42%, 58%)
HSV	hsv(235, 47%, 75%)
CMYK	cmyk(46.9%, 42.7%, 0%, 24.7%)
CIE-LAB	lab(49.23, 19.02, -44.07)
CIE-LCH	lch(49.23, 48.00, 293.34°)
OKLab	oklab(56.96% 0.0162 -0.1247)
OKLCH	oklch(56.96% 0.126 277.4)
XYZ	xyz(20.5669, 17.7813, 52.2074)
Luminance	0.1778 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EC0 #C0B866

analogous

#669BC0 #666EC0 #8B66C0

triadic

#666EC0 #C0666E #6EC066

tetradic

#666EC0 #C0669B #C0B866 #66C08B

square

#666EC0 #C0669B #C0B866 #66C08B

split-complementary

#666EC0 #C08B66 #9BC066

monochromatic

#32387A #444DA5 #666EC0 #9197D2 #BDC0E4

Accessibility & contrast

On white

4.61

#666EC0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#666EC0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666EC0

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EC0	#FFFFFF	#000000	##FFFFFF
##666EC0	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E79C3

Deuteranopia (green-blind)

#4772BE

Tritanopia (blue-blind)

#467F8E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666ec0;
/* rgb */ color: rgb(102, 110, 192);
/* oklch */ color: oklch(57.0% 0.126 277.4);

Tailwind

colors: {
  custom: {
    50: '#9697d3',
    500: '#666ec0',
    950: '#000000',
  },
}

SCSS

$custom: #666ec0;
$custom-light: #9697d3;
$custom-dark: #000000;

JSON

{
  "hex": "#666ec0",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 192
  },
  "hsl": {
    "h": 234.667,
    "s": 41.667,
    "l": 57.647
  },
  "oklch": {
    "l": 0.56955,
    "c": 0.12579,
    "h": 277.4
  },
  "luminance": 0.17782
}

Semantic roles & 50–950 ramp

primary

#666EC0

secondary

#D3D0AF

accent

#C756D1

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666EC0

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

Preview Lab → · Contrast checker → · Palette generator →