#666E78#666E78

#666E78 is a mid, near-neutral cyan. Relative luminance 0.153; OKLCH L 53.5% C 0.018 H 254.0°. Best body text is #FFFFFF at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#666E78
RGB	rgb(102, 110, 120)
HSL	hsl(213, 8%, 44%)
HSV	hsv(213, 15%, 47%)
CMYK	cmyk(15%, 8.3%, 0%, 52.9%)
CIE-LAB	lab(46.09, -0.79, -6.58)
CIE-LCH	lch(46.09, 6.62, 263.17°)
OKLab	oklab(53.49% -0.0051 -0.0177)
OKLCH	oklch(53.49% 0.018 254)
XYZ	xyz(14.4448, 15.3325, 19.9641)
Luminance	0.1533 (WCAG relative)
Temperature	neutral
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666E78 #787066

analogous

#667778 #666E78 #676678

triadic

#666E78 #78666E #6E7866

tetradic

#666E78 #786677 #787066 #667867

square

#666E78 #786677 #787066 #667867

split-complementary

#666E78 #786766 #777866

monochromatic

#2E3136 #4A5057 #666E78 #848D97 #A5ABB3

Accessibility & contrast

On white

5.16

#666E78 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.07

#666E78 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666E78

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666E78	#FFFFFF	#000000	##FFFFFF
##666E78	1.00	5.16	4.07	5.16
#FFFFFF	5.16	1.00	21.00	1.00
#000000	4.07	21.00	1.00	21.00
##FFFFFF	5.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B6E79

Deuteranopia (green-blind)

#696C78

Tritanopia (blue-blind)

#627071

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #666e78;
/* rgb */ color: rgb(102, 110, 120);
/* oklch */ color: oklch(53.5% 0.018 254.0);

Tailwind

colors: {
  custom: {
    50: '#91979f',
    500: '#666e78',
    950: '#000000',
  },
}

SCSS

$custom: #666e78;
$custom-light: #91979f;
$custom-dark: #000000;

JSON

{
  "hex": "#666e78",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 120
  },
  "hsl": {
    "h": 213.333,
    "s": 8.108,
    "l": 43.529
  },
  "oklch": {
    "l": 0.53488,
    "c": 0.01847,
    "h": 254
  },
  "luminance": 0.15333
}

Semantic roles & 50–950 ramp

primary

#666E78

secondary

#A29E97

accent

#9777B1

background

#F8F9F9

surface

#F0F2F2

border

#CBCCCC

text

#0C0D0E

muted

#7D7E7E

Preview Lab

Preview with #666E78

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

Preview Lab → · Contrast checker → · Palette generator →