So, you are thinking about the visual decoration of your guild. There are very few such people on the server. I'll try to help you a little bit.
First, take a look at the design of my clan:

|cA73FFFmyText|r -this is a format for recoloring text, you can also add addresses of small graphic elements inside the form and these images will also be recolored. the codes for the colors can be viewed online, for example here: https://www.rapidtables.com/web/color/RGB_Color.html
where can I find images and interface elements for visual design? They are available thanks to the developer add on here: https://www.esoui.com/downloads/info970-CirconiansTextureIt.html - a whole treasure trove!
the images, as in my example, can be found by typing part of the name into the window, for example this: «aw_crwn_sys»

the form for the picture in the guild description will be as follows: |t566:256:/esoui/art/store/announcement/aw_crwn_sys_mountstamina.dds|t - note that the original size of the image in the screenshot is 1024x512, and in my form I have shrunk it to 566x256 so that it fits harmoniously
small elements, as in my example, can be found by entering part of the name in the window, for example, this: «tabicon» these small icons are also recolored according to example 1- This is how it looks like: |t38:38:esoui/art/tutorial/guild-tabicon_home_up.dds|t
and this is how it looks with the addition of a different color, the color code and the address of the icon will be yours: |cB6B07E|t 38:38:esoui/art/tutorial/guild-tabicon_home_up.dds|t|r

you can find a lot of new things just by typing words at random, experiment!
upd^I didn't pay attention to your platform. In this case, you can ask for the addresses of graphic elements from other players