[schutzer-2010-eurjclinpharmacol-v66.pdf](https://github.com/izderadicka/pdfparser/files/3893512/schutzer-2010-eurjclinpharmacol-v66.pdf) only 2] is detected but no other blue characters were detected their rgb values are 0.7,0,7,0,7. How do i detect correct color of text