We like Benjamin Moore's collection called Fluid Blues http://www.benjaminmoore.com/en-us/for-your-home/color-stories/fluid-blues Especially St. John Blue and Intuition!

Thanks for asking.. I am so happy.. the house was so decayed so we decided to rebuild the same look of a 100 year old cottage but move all the living to the front for the river view.. so happy we did it and went for light grey and white and yellow.. so pleased and we have people in the park comment.. we could not go any bigger because of council and flood zone but it makes it special as it is. Some pictures I just took.. I took a picture of the outlook so you can see why it feels just right.. still work to do as in the gardens and just finding the right plants to put in as it is full sun. Will ask for help on that one too to make it feel cottagey but not block the view. Thanks again for asking. Karen

There's a lot of technical codes but if you scroll to the bottom there are Dulux suggestions.

We installed a feature wall of tiles in our bathroom of a similar pale blue-green colour to your examples. The closest dulux colour I came across was dewpoint. (Not quite close enough to be painted alongside the tile so we went with white for the non-tiled portion of wall so I can't show you a sample of it painted but might be worth looking at).