I want to know the meanings of three colors, white, blue, and gray.

[fanybook]

When it comes to colors, each system may use different colors.

I want to know the meanings of three speeds of rx/tx values

[greenec]

Based on this snippet:

https://github.com/wardi/speedometer/blob/43b25e8ab0731bdc7d30586a885eb36c0dbe564c/speedometer.py#L243-L265

There's the latest sample in cyan on the chart. To the right of the chart is a light blue bar - a curved reading which tries to smooth out the speed reading, and a white bar on the right for a running average.

The same order holds for the simple output and the text output below the chart:

• Current sample
• Curved
• Running average

Edit: See also: https://github.com/wardi/speedometer/issues/3#issuecomment-770321889