I try and not comment about this too much, but the text on the Docker site is stupidly hard to read. The font color, #7A8491, has a contrast ratio of 3.8/1 (black on white has a ratio of 21/1), which is barely above the w3 accessibility standards for _large_ text (18 point, or 14 point bold - higher for the thin stroke text the Docker page uses (Helvetica Neue Thin)).

Fix this, please, Docker. A few more points towards black isn't going to destroy the look and feel of your page.