#646C78#646C78

#646C78 is a mid, muted blue. Relative luminance 0.148; OKLCH L 52.9% C 0.021 H 258.4°. Best body text is #FFFFFF at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#646C78
RGB	rgb(100, 108, 120)
HSL	hsl(216, 9%, 43%)
HSV	hsv(216, 17%, 47%)
CMYK	cmyk(16.7%, 10%, 0%, 52.9%)
CIE-LAB	lab(45.35, -0.32, -7.70)
CIE-LCH	lch(45.35, 7.70, 267.65°)
OKLab	oklab(52.87% -0.0043 -0.0208)
OKLCH	oklch(52.87% 0.021 258.4)
XYZ	xyz(14.0074, 14.7903, 19.8825)
Luminance	0.1479 (WCAG relative)
Temperature	neutral
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C78 #787064

analogous

#647678 #646C78 #666478

triadic

#646C78 #78646C #6C7864

tetradic

#646C78 #786476 #787064 #647866

square

#646C78 #786476 #787064 #647866

split-complementary

#646C78 #786664 #767864

monochromatic

#2C3035 #484E57 #646C78 #828B97 #A4AAB3

Accessibility & contrast

On white

5.31

#646C78 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.96

#646C78 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C78

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C78	#FFFFFF	#000000	##FFFFFF
##646C78	1.00	5.31	3.96	5.31
#FFFFFF	5.31	1.00	21.00	1.00
#000000	3.96	21.00	1.00	21.00
##FFFFFF	5.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#686C79

Deuteranopia (green-blind)

#666A78

Tritanopia (blue-blind)

#5F6E70

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #646c78;
/* rgb */ color: rgb(100, 108, 120);
/* oklch */ color: oklch(52.9% 0.021 258.4);

Tailwind

colors: {
  custom: {
    50: '#90969f',
    500: '#646c78',
    950: '#000000',
  },
}

SCSS

$custom: #646c78;
$custom-light: #90969f;
$custom-dark: #000000;

JSON

{
  "hex": "#646c78",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 120
  },
  "hsl": {
    "h": 216,
    "s": 9.091,
    "l": 43.137
  },
  "oklch": {
    "l": 0.52866,
    "c": 0.02126,
    "h": 258.4
  },
  "luminance": 0.14791
}

Semantic roles & 50–950 ramp

primary

#646C78

secondary

#A29D96

accent

#9A76B2

background

#F8F9F9

surface

#F0F1F2

border

#CBCBCC

text

#0C0D0E

muted

#7D7E7E

Preview Lab

Preview with #646C78

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

Preview Lab → · Contrast checker → · Palette generator →