Opt for the svg version when using logos in web contexts.
<img src="//cdn.ldiglobal.org/cdis/short.svg" alt="CDIS" />
<img src="//cdn.ldiglobal.org/cdis/short.png" alt="CDIS" /><img src="//cdn.ldiglobal.org/cdis/short-black.svg" alt="CDIS" />
<img src="//cdn.ldiglobal.org/cdis/short-black.png" alt="CDIS" />
<img src="//cdn.ldiglobal.org/cdis/short-white.svg" alt="CDIS" />
<img src="//cdn.ldiglobal.org/cdis/short-white.png" alt="CDIS" /><img src="//cdn.ldiglobal.org/cdis/long.svg" alt="CDIS" />
<img src="//cdn.ldiglobal.org/cdis/long.png" alt="CDIS" /><img src="//cdn.ldiglobal.org/cdis/long-black.svg" alt="CDIS" />
<img src="//cdn.ldiglobal.org/cdis/long-black.png" alt="CDIS" /><img src="//cdn.ldiglobal.org/cdis/long-white.svg" alt="CDIS" />
<img src="//cdn.ldiglobal.org/cdis/long-white.png" alt="CDIS" />