Is Blur an ERC-20?

Could you please clarify for me if Blur is categorized as an ERC-20 token? I've been doing some research on different cryptocurrencies and their standards, but I'm still a bit hazy on the details. I've heard that ERC-20 tokens are built on the Ethereum blockchain and follow a specific set of rules, but I'm not sure if Blur falls into that category. Could you enlighten me on this matter? I'd appreciate it if you could provide a brief explanation or point me to some resources where I can learn more about ERC-20 tokens and how they differ from other types of cryptocurrencies. Thank you for your help!