(This is meta-problem mainly about the community, and might be better be discussed in a community space like Discord, but I don't have an account there. Also I see stuffs like #2067 so I think it safe to bring it up here.)
Currently Svelte projects are recognized as "HTML" projects (this is outloudvi/starbuttons-next):

This will be confusing for other developers. What's worse, it's bad for searching (since people cannot simply filter Svelte project by language) as well as the development of Svelte community. Therefore, I think it's important to get Svelte independently grouped as a language on GitHub like Vue does.
We see that GitHub can correctly highlight .svelte files (thanks for github/linguist#4504!), but Svelte has not been independently grouped. The reason seems to be here:
Svelte:
#...
group: HTML
#...
It's grouped in HTML, and as said in languages.yml, "Languages in a group are counted in the statistics as the parent language.", it's a part of HTML.
How to fix this? The solution is to get it out of the HTML group, and to do so we need to give Svelte a color different from HTML. github/linguist#4894 was a great try, but GitHub currently disallow too similar colors on their language palette (the color from Svelte logo, #ff3e00, is too close to some color on the palette). So, currently I think we can find an alternative color to represent Svelte on GitHub. To help with finding a valid color, here are some useful tools:
(I personally think #ee6600 can be one of the candidates, but there might be better choices!)
Absolutely agree that the group should be Svelte.
@vedam any thoughts on colour?
#ff43d6 is available
That meta label is a nice shade of purple actually.
no
@pngwn heh, seems you're looking for a mdsvex-color. 馃槀
@antony the first I found with the color-picker from above that comes close was: #d14900
#d14900
I think #ff163f might be the closest I've found on the color picker
Here are some others: #a4005c #ff029e #ff063f #ff013e #e20060
I like the @outloudvi version. #ff3e00 the current color of svelte.
Seems like there were some changes (they removed the color restrictions) in the linguist repo which made Svelte an independent language and even gave it the #ff3e00 color. So I think we just have to wait a little more until this is live and then this has solved itself.
From https://github.com/sveltejs/community

The change is live now. For some repos it might not show it yet probably because indexing that takes time.
Most helpful comment
#ff43d6is available