How to print a dictionary line by line in Python?

This is the dictionary

cars = {'A':{'speed':70,
        'color':2},
        'B':{'speed':60,
        'color':3}}

Using this for loop

for keys,values in cars.items():
    print(keys)
    print(values)

It prints the following:

B
{'color': 3, 'speed': 60}
A
{'color': 2, 'speed': 70}

But I want the program to print it like this:

B
color : 3
speed : 60
A
color : 2
speed : 70

I just started learning dictionaries so I'm not sure how to do this.

for x in cars:
    print (x)
    for y in cars[x]:
        print (y,':',cars[x][y])

output:

A
color : 2
speed : 70
B
color : 3
speed : 60