#666EBD#666EBD

#666EBD is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.8% C 0.121 H 277.4°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#666EBD
RGB	rgb(102, 110, 189)
HSL	hsl(234, 40%, 57%)
HSV	hsv(234, 46%, 74%)
CMYK	cmyk(46%, 41.8%, 0%, 25.9%)
CIE-LAB	lab(49.07, 18.10, -42.60)
CIE-LCH	lch(49.07, 46.29, 293.02°)
OKLab	oklab(56.78% 0.0157 -0.1204)
OKLCH	oklch(56.78% 0.121 277.4)
XYZ	xyz(20.2379, 17.6497, 50.4746)
Luminance	0.1765 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EBD #BDB566

analogous

#669ABD #666EBD #8A66BD

triadic

#666EBD #BD666E #6EBD66

tetradic

#666EBD #BD669A #BDB566 #66BD8A

square

#666EBD #BD669A #BDB566 #66BD8A

split-complementary

#666EBD #BD8A66 #9ABD66

monochromatic

#333976 #454EA1 #666EBD #9197CF #BCBFE2

Accessibility & contrast

On white

4.64

#666EBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#666EBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666EBD

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EBD	#FFFFFF	#000000	##FFFFFF
##666EBD	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5078C0

Deuteranopia (green-blind)

#4971BB

Tritanopia (blue-blind)

#477E8C

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666ebd;
/* rgb */ color: rgb(102, 110, 189);
/* oklch */ color: oklch(56.8% 0.121 277.4);

Tailwind

colors: {
  custom: {
    50: '#9697d1',
    500: '#666ebd',
    950: '#000000',
  },
}

SCSS

$custom: #666ebd;
$custom-light: #9697d1;
$custom-dark: #000000;

JSON

{
  "hex": "#666ebd",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 189
  },
  "hsl": {
    "h": 234.483,
    "s": 39.726,
    "l": 57.059
  },
  "oklch": {
    "l": 0.56779,
    "c": 0.12145,
    "h": 277.4
  },
  "luminance": 0.17651
}

Semantic roles & 50–950 ramp

primary

#666EBD

secondary

#D1CEAE

accent

#C558D0

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #666EBD

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

Preview Lab → · Contrast checker → · Palette generator →