#676a64 - Castor Grey color

A muted, medium-dark gray-green with cool undertones and a subtle olive cast. It reads as a sophisticated, smoky slate that balances neutral restraint with organic warmth. Comfortable and calming, it pairs well with cream, warm woods, or brass for a refined, natural palette, or with brighter teals and corals for contrast. Ideal for backgrounds, accent walls, or understated branding, it conveys quiet maturity, stability, and an earthy, contemporary elegance.

Color Conversion

Name
Values
CSS
RGB(0-255)
103, 106, 100
rgb(103, 106, 100)
CMYK
0.0283, 0.00, 0.0566, 0.584
-
sRGB
0.404, 0.416, 0.392
rgb(40.4% 41.6% 39.2%)
Adobe® 98 RGB compatible
0.406, 0.414, 0.393
color(a98-rgb 0.406 0.414 0.393)
HCT
145, 4.96, 44.4
color(--hct 145 3.42% 44.4%)
HSL
90.0, 2.91, 40.4
hsl(90 2.91% 40.4%)
HSV
90.0, 5.66, 41.6
color(--hsv 90 5.66% 41.6%)
HWB
90.0, 39.2, 58.4
hwb(90 39.2% 58.4%)
Lab
44.4, -2.12, 2.96
lab(44.4 -2.12 2.96)
P3
0.406, 0.415, 0.394
color(display-p3 0.406 0.415 0.394)
XYZ D50
0.133, 0.141, 0.107
color(xyz-d50 0.133 0.141 0.107)

Shades

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Tints

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Tones

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Color Harmonies

HEX:#676a64
RGB:103 106 100
HSL:90deg 2.91% 40.39%
HEX:#67646a
RGB:103 100 106
HSL:270deg 2.91% 40.39%

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