In the dark theme, the contrast between the disabled gray caret (#9da4af) and the button background (#4C9990) is: 1.33:1  In the contrast theme, the contrast between the disabled gray caret (#505862) and the button background (#000) is: 2.91:1 (it also fails with #1E1E1E)  In the light theme, the contrast between the disabled gray caret (#f1f2f4) and the button background (#d5d8dd) is: 1.27:1  The greyscale theme is intentionally low contrast. Original Jira issue: https://fluidproject.atlassian.net/browse/C2LC-554