Cream on the cabinets a nice touch but don't be afraid to put some colour depth into the walls.If you are accenting with yellows a nice yellow on the wall is a great backdrop with navy and cream, picking up a cream with a hint of yellow undertone for the cabinets , this wall colour will help balance out the weight of the navy stripe , and create warmth .

Have you painted your walls yet? If not, you will probably see your creamy cabinets loose some of the “yellowness” because the light will be reflecting off of the Coventry grey walls while your crown will stay pretty much the same because of reduced light at the ceiling line. Combination of different light reflection throughout the day and night, the position of the painted surface and the amount of any one surface plane determines how your eye interprets the color. The cabinets have a large flat surface plane so they will always show a different hue of the same color than the crown in the same color. Also, the cabinets are recipients of more light and reflections than the ceiling/crown. Shade differences provide subtle highlights to details which add depth to a room and a strong backdrop for furnishings. White Dove is a favorite color of designers because it works well with both warm and cool colors. Once you have everything in place and you are functioning in the kitchen, the hue differences will not be your focus which is now the case as you critically look at each individual step in the process. Not sure about your frustration level but I wouldn't go crazy over this.

BM White Dove is lovely, as is Cloud White. Both are used frequently for trim and cabinetry. They aren't bright pure whites, but rather slightly off-whites that "read" as white.

i have sea pearl cabinets (basically, antique white) and white dove trim. but i have an off white backsplash, and marble-type counters. so i'd say yes, two not-quite-whites will play well together if there are other tones of white too. if everything is one, and one thing is another, it can look odd man out. but if there are 5 shades of white happening, it all reads as 'white'.