Blue is so calm and reassuring it can often be seen as a neutral. It is crisp and cool, no-nonsense, but also soothing and helpful.  All of these terms could also apply to green, though it also carries an earthiness which makes it a tad warmer than blue. Green and blue can be tricky when paired since they are so close together on the spectrum. In fact, some languages don’t even differentiate between the two colours, and only have one term for both. Yet they are distinct, as green is a combination of blue and yellow and therefore contains yellow’s optimism and positivity, perfectly balanced with blue’s calm intelligence. A vibrant, emerald green will pair well with a baby blue, just as cobalt will work well with lime. Juxtaposed in this way, both blue and green are elevated, and become more bold than either would be on their own. Do not underestimate these cool tones, as their forces combined will heat up a room.