Mine is also blue, but it is not a light blue as it is using #0000ff It also depends upon whether the original was black text or whether you have settings that overruled it. For example, I received an email which was written and sent only in plain text. In the Message Pane the text colour is black on white background. Normally, I'm using html when composing, but if I hold down Shift and click on 'Reply' it will be forced to create email using Plain Text. I'm using Dark theme, so now dark default alters the situation and the background is dark and the text is white. That 'white' setting is set up here - obviously if you are using a Light theme then text would be set up as 'black'. Menu icon > Settings > General Scroll down to 'Language & Appearance' section Plain text messages: When displaying quoted plain text messages: click on that coloured rectangle button and you will be able to choose a colour of preference. then click on OK. I selected white because I'm using a dark theme. However, I'm not sure whether you are normally creating and sending emails using html regardless of whether you receive them in plain text or html. Menu icon > Settings > General Scroll down to 'Language & Appearance' section Click on 'Colours' button Set 'Text' as Black Set 'Background' as white Uncheck - do not select - 'Use System colours' 'Override the colours specified by the content with my selections above' set as Never click on OK