#666C88#666C88

#666C88 is a mid, muted blue. Relative luminance 0.153; OKLCH L 53.7% C 0.044 H 275.4°. Best body text is #FFFFFF at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#666C88
RGB	rgb(102, 108, 136)
HSL	hsl(229, 14%, 47%)
HSV	hsv(229, 25%, 53%)
CMYK	cmyk(25%, 20.6%, 0%, 46.7%)
CIE-LAB	lab(46.08, 4.32, -16.15)
CIE-LCH	lch(46.08, 16.72, 284.97°)
OKLab	oklab(53.67% 0.0042 -0.0443)
OKLCH	oklch(53.67% 0.044 275.4)
XYZ	xyz(15.2848, 15.3271, 25.4409)
Luminance	0.1533 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666C88 #888266

analogous

#667D88 #666C88 #716688

triadic

#666C88 #88666C #6C8866

tetradic

#666C88 #88667D #888266 #668871

square

#666C88 #88667D #888266 #668871

split-complementary

#666C88 #887166 #7D8866

monochromatic

#323442 #4C5065 #666C88 #878CA5 #AAADBF

Accessibility & contrast

On white

5.17

#666C88 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.07

#666C88 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666C88

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666C88	#FFFFFF	#000000	##FFFFFF
##666C88	1.00	5.17	4.07	5.17
#FFFFFF	5.17	1.00	21.00	1.00
#000000	4.07	21.00	1.00	21.00
##FFFFFF	5.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#646F89

Deuteranopia (green-blind)

#626C87

Tritanopia (blue-blind)

#5E7175

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #666c88;
/* rgb */ color: rgb(102, 108, 136);
/* oklch */ color: oklch(53.7% 0.044 275.4);

Tailwind

colors: {
  custom: {
    50: '#9296aa',
    500: '#666c88',
    950: '#000000',
  },
}

SCSS

$custom: #666c88;
$custom-light: #9296aa;
$custom-dark: #000000;

JSON

{
  "hex": "#666c88",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 136
  },
  "hsl": {
    "h": 229.412,
    "s": 14.286,
    "l": 46.667
  },
  "oklch": {
    "l": 0.53671,
    "c": 0.04447,
    "h": 275.4
  },
  "luminance": 0.15327
}

Semantic roles & 50–950 ramp

primary

#666C88

secondary

#AEAB9C

accent

#AB71B7

background

#F9F9FA

surface

#F1F1F4

border

#CBCBCE

text

#0D0D10

muted

#7E7E7F

Preview Lab

Preview with #666C88

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

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