🟦🔵🔷💙🌀

#shades of blue #blue colors #blue palette #blue spectrum #hues of blue

🔬🟦✨

#indium #spectroscopy #indigo line #element discovery #reich and richter #blue spectrum

🧊💧🌊💙🧿🟦

#blue spectrum #shades of blue #blue gradient #monochromatic rainbow #blue variation