Does anyone know what adult messaging/dating site would have a black background with pinky/purple icons down the left side of the inbox?

I’ve caught a few glimpses of it over my boyfriend’s shoulder, the messages/posts appear to include graphic images as well. I really want to know what it is before I confront him as I’ve suspected him of messaging other women in the past which he explained away and I gave him the benefit of the doubt but I’m not prepared to do that again.

Does anyone know what adult messaging/dating site would have a black background with pinky/purple icons down the left side of the inbox?
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