diff --git a/doc/api/assert.md b/doc/api/assert.md
index 7df70f60c35952..d27094fec53425 100644
--- a/doc/api/assert.md
+++ b/doc/api/assert.md
@@ -114,9 +114,13 @@ assert.deepEqual([[[1, 2, 3]], 4, 5], [[[1, 2, '3']], 4, 5]);
 //   ]
 ```
 
-To deactivate the colors, use the `NODE_DISABLE_COLORS` environment variable.
+To deactivate the colors, use the `NO_COLOR` or
+`NODE_DISABLE_COLORS` environment variable.
 This will also deactivate the colors in the REPL.
 
+For more on the color support in terminal environments, read
+the tty [getColorDepth()](tty.html#tty_writestream_getcolordepth_env) doc.
+
 ## Legacy mode
 
 Legacy mode uses the [Abstract Equality Comparison][] in: