Davy's gray and Grayness

Davy's gray noun - Slightly purplish or bluish dark grey.

Grayness and Davy's gray are semantically related. In some cases you can use "Grayness" instead a noun phrase "Davy's gray".

Grayness noun - A neutral achromatic color midway between white and black.

Davy's gray and grayness are semantically related. Sometimes you can replace phrase "Davy's gray" with "Grayness", this terms are similar.