BJCP Style Guidelines. Handy for checking out a beer you are making.
10A. American Pale Ale
Aroma: Usually moderate to strong hop aroma from dry hopping or late kettle additions of American hop varieties. A citrusy hop character is very common, but not required. Low to moderate maltiness supports the hop presentation, and may optionally show small amounts of specialty malt character (bready, toasty, biscuity). Fruity esters vary from moderate to none. No diacetyl. Dry hopping (if used) may add grassy notes, although this character should not be excessive.
Appearance: Pale golden to deep amber. Moderately large white to off-white head with good retention. Generally quite clear, although dry-hopped versions may be slightly hazy.
Flavor: Usually a moderate to high hop flavor, often showing a citrusy American hop character (although other hop varieties may be used). Low to moderately high clean malt character supports the hop presentation, and may optionally show small amounts of specialty malt character (bready, toasty, biscuity). The balance is typically towards the late hops and bitterness, but the malt presence can be substantial. Caramel flavors are usually restrained or absent. Fruity esters can be moderate to none. Moderate to high hop bitterness with a medium to dry finish. Hop flavor and bitterness often lingers into the finish. No diacetyl. Dry hopping (if used) may add grassy notes, although this character should not be excessive.
Mouthfeel: Medium-light to medium body. Carbonation moderate to high. Overall smooth finish without astringency often associated with high hopping rates.
Overall Impression: Refreshing and hoppy, yet with sufficient supporting malt.
History: An American adaptation of English pale ale, reflecting indigenous ingredients (hops, malt, yeast, and water). Often lighter in color, cleaner in fermentation by-products, and having less caramel flavors than English counterparts.
Comments: There is some overlap in color between American pale ale and American amber ale. The American pale ale will generally be cleaner, have a less caramelly malt profile, less body, and often more finishing hops.
Ingredients: Pale ale malt, typically American two-row. American hops, often but not always ones with a citrusy character. American ale yeast. Water can vary in sulfate content, but carbonate content should be relatively low. Specialty grains may add character and complexity, but generally make up a relatively small portion of the grist. Grains that add malt flavor and richness, light sweetness, and toasty or bready notes are often used (along with late hops) to differentiate brands.
Vital Statistics: OG: 1.045 – 1.060
IBUs: 30 – 45 FG: 1.010 – 1.015
SRM: 5 – 14 ABV: 4.5 – 6.2%
Commercial Examples: Sierra Nevada Pale Ale, Stone Pale Ale, Great Lakes Burning River Pale Ale, Bear Republic XP Pale Ale, Anderson Valley Poleeko Gold Pale Ale, Deschutes Mirror Pond, Full Sail Pale Ale, Three Floyds X-Tra Pale Ale, Firestone Pale Ale, Left Hand Brewing Jackman’s Pale Ale
You can use just about any spec malt in the 30-500EBC range to give the colour you require - keeping it in the "style" will help keep it balanced.
I like Caramunich in an APA for colour and flavour, but as you can read above, the non-American part of APAs is probably their use of English-style spec malts (biscuit & bread). There are heaps of them though and to be honest, the colour and the flavour are quite connected - so the colour is a good indicator.
