After the completion of a site survey with Ekahau Site Survey tool, using the default color palette, it is noted that multiple areas are shown as white on the heat map when viewing 5 GHz signal…

-67 dBm is a commonly referenced minimum threshold for acceptable Wi-Fi coverage and would still render as a color such as orange or red on the heat map, not white.

-100 dBm is an extremely weak but still detectable signal level and would be represented by a dark color on the heat map rather than white.

White in Ekahau's default palette is not tied to a user-configured minimum threshold - it specifically indicates areas where the adapter detected no RF signal at all.

In Ekahau's default color palette, white represents areas where the measured signal falls below the detectable range of the survey adapter, meaning no RF energy was captured at those locations. This is distinct from very low but measurable signal values such as -90 or -100 dBm, which still render as a dark color on the heat map. White specifically signals a complete absence of measurable RF, not merely weak or marginal coverage.