#666397#666397

#666397 is a mid, moderate blue. Relative luminance 0.140; OKLCH L 52.4% C 0.081 H 285.9°. Best body text is #FFFFFF at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#666397
RGB	rgb(102, 99, 151)
HSL	hsl(243, 21%, 49%)
HSV	hsv(243, 34%, 59%)
CMYK	cmyk(32.5%, 34.4%, 0%, 40.8%)
CIE-LAB	lab(44.21, 13.81, -27.98)
CIE-LCH	lch(44.21, 31.20, 296.26°)
OKLab	oklab(52.43% 0.0222 -0.078)
OKLCH	oklch(52.43% 0.081 285.9)
XYZ	xyz(15.5258, 13.9824, 31.1530)
Luminance	0.1398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666397 #949763

analogous

#637A97 #666397 #806397

triadic

#666397 #976663 #639766

tetradic

#666397 #97637A #949763 #639780

square

#666397 #97637A #949763 #639780

split-complementary

#666397 #978063 #7A9763

monochromatic

#34334D #4D4B72 #666397 #8987B0 #AEACC9

Accessibility & contrast

On white

5.53

#666397 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.80

#666397 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666397

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666397	#FFFFFF	#000000	##FFFFFF
##666397	1.00	5.53	3.80	5.53
#FFFFFF	5.53	1.00	21.00	1.00
#000000	3.80	21.00	1.00	21.00
##FFFFFF	5.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#546A99

Deuteranopia (green-blind)

#536796

Tritanopia (blue-blind)

#5A6C76

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #666397;
/* rgb */ color: rgb(102, 99, 151);
/* oklch */ color: oklch(52.4% 0.081 285.9);

Tailwind

colors: {
  custom: {
    50: '#938fb6',
    500: '#666397',
    950: '#000000',
  },
}

SCSS

$custom: #666397;
$custom-light: #938fb6;
$custom-dark: #000000;

JSON

{
  "hex": "#666397",
  "rgb": {
    "r": 102,
    "g": 99,
    "b": 151
  },
  "hsl": {
    "h": 243.462,
    "s": 20.8,
    "l": 49.02
  },
  "oklch": {
    "l": 0.52431,
    "c": 0.08106,
    "h": 285.9
  },
  "luminance": 0.13983
}

Semantic roles & 50–950 ramp

primary

#666397

secondary

#B6B79F

accent

#BD6AB9

background

#F9F8FB

surface

#F1F0F6

border

#CBCBD0

text

#0D0C11

muted

#7E7D80

Preview Lab

Preview with #666397

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

Preview Lab → · Contrast checker → · Palette generator →