#666EBA#666EBA

#666EBA is a mid, moderate blue. Relative luminance 0.175; OKLCH L 56.6% C 0.117 H 277.4°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#666EBA
RGB	rgb(102, 110, 186)
HSL	hsl(234, 38%, 56%)
HSV	hsv(234, 45%, 73%)
CMYK	cmyk(45.2%, 40.9%, 0%, 27.1%)
CIE-LAB	lab(48.91, 17.19, -41.12)
CIE-LCH	lch(48.91, 44.57, 292.69°)
OKLab	oklab(56.61% 0.0151 -0.1161)
OKLCH	oklch(56.61% 0.117 277.4)
XYZ	xyz(19.9157, 17.5208, 48.7773)
Luminance	0.1752 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EBA #BAB266

analogous

#6698BA #666EBA #8866BA

triadic

#666EBA #BA666E #6EBA66

tetradic

#666EBA #BA6698 #BAB266 #66BA88

square

#666EBA #BA6698 #BAB266 #66BA88

split-complementary

#666EBA #BA8866 #98BA66

monochromatic

#333972 #464F9C #666EBA #9096CD #BABEE0

Accessibility & contrast

On white

4.66

#666EBA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#666EBA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666EBA

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EBA	#FFFFFF	#000000	##FFFFFF
##666EBA	1.00	4.66	4.50	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5278BD

Deuteranopia (green-blind)

#4B71B8

Tritanopia (blue-blind)

#497E8B

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666eba;
/* rgb */ color: rgb(102, 110, 186);
/* oklch */ color: oklch(56.6% 0.117 277.4);

Tailwind

colors: {
  custom: {
    50: '#9697cf',
    500: '#666eba',
    950: '#000000',
  },
}

SCSS

$custom: #666eba;
$custom-light: #9697cf;
$custom-dark: #000000;

JSON

{
  "hex": "#666eba",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 186
  },
  "hsl": {
    "h": 234.286,
    "s": 37.838,
    "l": 56.471
  },
  "oklch": {
    "l": 0.56606,
    "c": 0.11708,
    "h": 277.4
  },
  "luminance": 0.17522
}

Semantic roles & 50–950 ramp

primary

#666EBA

secondary

#CFCCAD

accent

#C35ACE

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #666EBA

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

Preview Lab → · Contrast checker → · Palette generator →