"Red, yellow, and orange are fall colors."

Translation: Červená, žlutá a oranžová jsou barvy podzimu.

[JamesA134505]

Why do the adjectives finished with an "á" instead of "é"? ta barva, ty barvy. My answer "červené, žluté, oranžové jsou barvy podzimu." was rejected....

[kacenka9]

Those are not adjectives. They are nouns in this sentence.

[JamesA134505]

In czech nouns that are colours have a čárka?

[ion1122]

red (noun) = červená barva = červená, etc.

Here "červená" is an adjective used as a noun.

The standard ending for a feminine noun like "barva" in the nominative singular is -a, not -é. Cf. "žena".

The standard ending for a "hard" adjective in the feminine singular nominative is -á, not -é.

So -é does not enter the picture here; it is the hard adjective ending for neuter (not feminine) nominative singular.

[RoryBaskin]

Why is this podzimu? And was this explained somewhere in the notes that I missed? And if so, where?

[VladaFu]

Literally "colours OF fall", belonging to fall, hence the genitive case. I do not remember which skill it introduces but there should be Tips and notes available.

[TomasRejda]

Why is podzimové barvy wrong?

[AgnusOinas]

Because the adjective is "podzimní" ;) (similarly: zimní, jarní, letní, roční, měsíční, týdenní, denní....)