I'LL TRY TO MAKE AS SIMPLE AS I CAN.
1) النعت والمنعوت
النعت is simply an ADJECTIVE..Any adjective( colors are also adjectives)
المنعوت is the NOUN that's described by the adjective..
Ex: السيارة السريعة (The fast car)
السريعة is the adjective so it's نعت
السيارة ist the noun described so it's منعوت
NOW:
النعت and المنعوت MUST be identical in all of the following:
1)Number
Ex: You can't say السيارتان السريعة (The two cars is fast) because النعت refers to singular and المنعوت refers to two
So you must say:السياراتان السريعتان(Both 2)
OR السيارة السريعة (Both sing)
2) Gender
Ex:الطالبان الممتازتان(The two students(male) are outstanding(female)) here, التعت and المنعوت are identical in number(both two) BUT they are different in gender
So you must say: الطالبان ممتازان( The two students(male) are outstanding(male)
OR
الطالبتان الممتازتان (The two students(female) are outstanding(female))
3) Case
If النعت in nominative, so must be المنعوت
if النعت in accusative or dative, so must be المنعوت
Ex:القلمان الأحمرين (The two red pens) is not correct
القلمان الأحمران OR القلمين الأحمرين is.
4)Article( definite or indefinite) #The definite article in Arabic is ال
Ex:الولدان نشيطان
The sentence here is CORRECT but you can't say الولدان and نشيطان are نعت and منعوت.
الولدان is with definite article AND نشيطان is without
الولدان النشيطان would be correct example of نعت and منعوت because all conditions above are met.(You can check it yourself)
المنظر الجميل(The beautiful scenery) also
الجو البارد(The cold Weather)