The caps are a dark steely or indigo blue and finely downy or scurfy.  Gills are white, with a sligt blue tinge, maturing to a salmony pink.  The stipe is fibrillose with blue fibrils over a white ground.

There are several other dark-blue species of Entoloma.

microscope

Identification is very difficult, requiring microscopic examination.  If you have not done this or if the specimen has not been examined by an expert, please submit your record as genus only (Entoloma)

Unimproved grassland and heath; deciduous woodland

Summer and autumn.

Infrequent in Leicestershire and Rutland.

https://www.first-nature.com/fungi/entoloma-chalybaeum.php

In the image below, the red box means that the identification is tentative and not confirmed microscopically.  Because of the importance of Entoloma as indicators of conservation-value grasslands, we have retained it as an example of this group of species.