cartography - Is there a recomended method for symbolizing inland lakes, streams and rivers in a topographic map?

I produce a lot of maps with inland lakes, rivers and streams overlaid over a dem surface symbolized with a color graduation (green for lows and brown for higher elevations) I also use a semi-transparent shaded relief to enhance the terrain. I have a standard blue color I often used for both lakes and streams but I noticed that sometimes the hydrology does not stand out enough. I experimented with outline for the lakes and with dark and light blues but nothing seems to work for every map.

Can someone recommend a good color/method for symbolizing lakes/streams/rivers?

Is there a generally accepted standard theme for symbolizing lakes/streams/rivers? (Ontario, Canada)