Caption Color

Sets the base text color for burn-in captions.

video-caption-color accepts a hex color value (without the # prefix). This color is applied to all caption text. In karaoke style, this is the color of words that have not yet been spoken.

https://assets.imgix.net/video.mp4?fm=mp4&video-generate-subtitles=true&video-caption-style=karaoke&video-caption-color=FFFFFF

For karaoke style, use video-caption-highlight-color to set the color of the currently spoken word.