:10fce15c-8f50-47b9-a8a3-683b09c46a1f: - 10fce15c 8f50 47b9 a8a3 683b09c46a1f Slack emoji

Install the EmojiBox Chrome extension and push :10fce15c-8f50-47b9-a8a3-683b09c46a1f: straight to Slack from this page — no download, no upload.

Or do it manually

1. Click Download PNG at the top.
2. In Slack, open the emoji picker and choose Add custom emoji.
3. Upload the file, name it 10fce15c-8f50-47b9-a8a3-683b09c46a1f, and you're done.