COLOUR BACKGROUND ACTIVITY dont fixed in black colour

I have the same problem!! Also in spanish!

Please fix it! It is important to battery life!

On LCD screens, the color does not influence battery life. You can even say that white color on lcd consumes less because the backlight doesn't have to be that bright

Amoled use less power on black screens.

Vivoactive is lcd, venu is amoled

Thank you very much for this information!

But, even if that is true, if I want to have the black background because I like it, it change every time that you starts an activity :(

Yes you are correct. It should be fixed.

But i think garmins priority at the moment is wifi and the heart rate being inaccurate.

Esthetics is an easy fix and not a blocking issue, tuning hardware is priority.

In swimming mode is the same. English/spanish mixed when the activity start

You don't even need to reboot. Just close the activity and reopen it, go back to settings: white is back :-)

For me the first priority shoud be the battery! It is impossible to have even 5 days.. And the promess was 8 days... the battery life is a joke... even the Venu has more battery life with the amoled screen..

I dont understand how garmin has not already publised another release... the 3.40 is no enough for users..

Stratos 3 are going to beat it very easily... 

in 4s or 4

Same here. The background color is reset to white as soon as I exit the activity settings.

I often walk/run in the dark, and taking a look at my watch that is all white makes it more difficult for me to see my surroundings until my eyes have adjusted again.