UX-related issue #116

I love this app, it's so way better than Chrome's own LiveCaptioning: less lag, more accuracy (for english). I can't wait for it to caption Italian too :)

However, i need to point out that color-wise, the changes in the microphone icon when switching between listening sources is way TOO small. I would suggest at least changing its color or its shape (mic icon vs monitor icon, for example).

The change in color shading to indicate degree of accuracy is a lovely idea, but it should: 1) follow the color gradient of the main color (e.g. if I want text to be in yellow, the shading should be different levels of saturation) and/or at least be on the same opacity level as the main text color.

Overall, opacity of background and of text should be two different and separate values.

Hope all that's somewhat understandable?