#666EBB#666EBB

#666EBB is a mid, moderate blue. Relative luminance 0.176; OKLCH L 56.7% C 0.119 H 277.4°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#666EBB
RGB	rgb(102, 110, 187)
HSL	hsl(234, 38%, 57%)
HSV	hsv(234, 45%, 73%)
CMYK	cmyk(45.5%, 41.2%, 0%, 26.7%)
CIE-LAB	lab(48.96, 17.50, -41.61)
CIE-LCH	lch(48.96, 45.14, 292.80°)
OKLab	oklab(56.66% 0.0153 -0.1175)
OKLCH	oklch(56.66% 0.119 277.4)
XYZ	xyz(20.0223, 17.5635, 49.3392)
Luminance	0.1756 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EBB #BBB366

analogous

#6699BB #666EBB #8966BB

triadic

#666EBB #BB666E #6EBB66

tetradic

#666EBB #BB6699 #BBB366 #66BB89

square

#666EBB #BB6699 #BBB366 #66BB89

split-complementary

#666EBB #BB8966 #99BB66

monochromatic

#333973 #464E9E #666EBB #9096CE #BBBEE1

Accessibility & contrast

On white

4.65

#666EBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#666EBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666EBB

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EBB	#FFFFFF	#000000	##FFFFFF
##666EBB	1.00	4.65	4.51	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5178BE

Deuteranopia (green-blind)

#4B71B9

Tritanopia (blue-blind)

#497E8B

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666ebb;
/* rgb */ color: rgb(102, 110, 187);
/* oklch */ color: oklch(56.7% 0.119 277.4);

Tailwind

colors: {
  custom: {
    50: '#9697d0',
    500: '#666ebb',
    950: '#000000',
  },
}

SCSS

$custom: #666ebb;
$custom-light: #9697d0;
$custom-dark: #000000;

JSON

{
  "hex": "#666ebb",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 187
  },
  "hsl": {
    "h": 234.353,
    "s": 38.462,
    "l": 56.667
  },
  "oklch": {
    "l": 0.56663,
    "c": 0.11854,
    "h": 277.4
  },
  "luminance": 0.17564
}

Semantic roles & 50–950 ramp

primary

#666EBB

secondary

#D0CDAD

accent

#C359CE

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #666EBB

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

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