Shade

noun

1. Darkness where light, particularly sunlight, is blocked.

   "The old oak tree gave shade in the heat of the day."

2. Something that blocks light, particularly in a window.

   "Close the shade, please: it's too bright in here."

3. A variety of a colour/color, in particular one obtained by adding black (compare tint).

   "I've painted my room in five lovely shades of pink and chartreuse."

4. A subtle variation in a concept.

   "shades of meaning"

5. An aspect that is reminiscent of something.

   "shades of Groucho"