updated color badges

Author: simongravelle

.DESCRIPTION.md

@@ -1,6 +1,6 @@
 [![DOI](https://zenodo.org/badge/314814105.svg)](https://zenodo.org/doi/10.5281/zenodo.14747799)
-[![License: CC BY 4.0](https://img.shields.io/badge/License-CC%20BY%204.0-lightgrey.svg)](https://creativecommons.org/licenses/by/4.0/)
-[![PDF](https://img.shields.io/badge/PDF-lammps--tutorials.pdf-red.svg)](lammps-tutorials.pdf)
+[![License: CC BY 4.0](https://img.shields.io/badge/License-CC%20BY%204.0-blue.svg)](https://creativecommons.org/licenses/by/4.0/)
+[![PDF](https://img.shields.io/badge/PDF-lammps--tutorials.pdf-blue.svg)](lammps-tutorials.pdf)
 
 # A Set of Tutorials for the LAMMPS Simulation Package
 

README.md

@@ -8,8 +8,8 @@ list in "files.txt".
 
 
 [![DOI](https://zenodo.org/badge/314814105.svg)](https://zenodo.org/doi/10.5281/zenodo.14747799)
-[![License: CC BY 4.0](https://img.shields.io/badge/License-CC%20BY%204.0-lightgrey.svg)](https://creativecommons.org/licenses/by/4.0/)
-[![PDF](https://img.shields.io/badge/PDF-lammps--tutorials.pdf-red.svg)](lammps-tutorials.pdf)
+[![License: CC BY 4.0](https://img.shields.io/badge/License-CC%20BY%204.0-blue.svg)](https://creativecommons.org/licenses/by/4.0/)
+[![PDF](https://img.shields.io/badge/PDF-lammps--tutorials.pdf-blue.svg)](lammps-tutorials.pdf)
 
 # A Set of Tutorials for the LAMMPS Simulation Package