Have used these silica gel granules before. It seems the green/orange types are safer though.
Why Use Orange Indicating Silica Gel?
In 1998, the European Union prohibited Blue Indicating Silica Gel (which contains
cobalt chloride, a known human toxin) from being sold within European markets. Alternatively, Orange Indicating Silica Gel, which is used in a variety of the same industries and applications, such as transformer breathers and compressed air dryers, conforms to the European Union requirements for moisture indicating desiccants.
In addition to conforming to EU requirements, AGM’s Orange Silica Gel also has a high adsorption capacity, and will remove moisture at temperatures as high as 150° F (65°C). However, it is best used at room temperature (70‐90° F /21-32°C).
https://www.agmcontainer.com/blog/desiccant/indicating-silica-gel/