If we extract the adjectives from these examples, we'll get the declension of adjectives if there is an indefinite article before the noun (actually before the adjective, to be precise). Details about the indefinite articles you'll find in chapter 11.

declension of blond as an adjective neutral singular plural masculine singular plural feminine singular plural   Nominative blondes blonde Nominative blonder blonde Nominative blonde blonde   Genitive blonden blonder Genitive blonden blonder Genitive blonden blonder   Dative blonden blonden Dative blonden blonden Dative blonden blonden   Accusative blondes blonde Accusative blonden blonde Accusative blonde blonde

Endings of the declensions neutral singular plural masculine singular plural feminine singular plural   Nominative -es -e Nominative -er -e Nominative -e -e   Genitive -en -er Genitive -en -er Genitive -en -er   Dative -en -en Dative -en -en Dative -en -en   Accusative -es -e Accusative -en -e Accusative -e -e