I have synesthesia and it's always been turquoise (green/blue) to me. Interesting how many people seem to agree with me since I thought it would be pretty individual.

To me it's more like yellow.

E is a blue-ish color.

https://www.discovermagazine.com/lots-of-cases-of-synesthesia-are-based-on-alphabet-magnets-748

What a ridiculous and unnecessary question. The letter E is clearly light green.

Butter yellow

I don't even understand the question.

I mean, I know what you're asking, but I don't know how to answer it. Letters don't have colours. They don't have anything. Maybe it's my aphantasia, but I don't understand how a letter can have an innate colour or what that would even mean.

Green or blue. Maybe kind of an aqua?

Check this out:
https://en.wikipedia.org/wiki/Synesthesia

Yellow

It's yellow.

I don't have any sort of synesthesia, but tried to engage with the question. Was utterly unable to summon an opinion of my own, but reading through other answers yellow seems to "click" the most.

Feel like its Green

White or black, depending on color scheme, as we can clearly observe right now. E

A little e is forest green. But a capital E is red.

Red, totally red and somewhat bright.

As a non-synaesthete, I dug around in my brain until the answer "white" came to me.

The reason: I am old and Control+E on a Commodore 64 (and some of its close relatives) would turn the cursor and text colour to white. It was the only Control+ that affected a colour change too.

Yellow/orange.

A very pale blue

I have synesthesia and it’s definitely black

White

Green

#eee is a very light shade of grey

I have the wrong synesthesia for this...

Black, like all the other letters.

Maybe a kind of teal, sea green.

It's green. If you have colours associated with letters or numbers, there's a good chance you have a form of synesthesia.

Brown

Edit: Boy I guess nobody likes Brown E's....

(0, 0, 69) in RGB, or #000045 in HEX.

This is a dark blue color.

Without seeing your choice I was oscillating between blue and green but settled on green.

Yellow

Capital E is yellow, lowercase e is green.