Grass Green
I hesitated between this photo and another photo with a red bench in it. But at last I chose this one just because I prefer vivid green. It reminds me of pure and fresh things that make me feel comfortable. Especially in a warm afternoon, going close to the nature is an amazing cool thing. Just let the sun shines through your mind and feel that warm and calm. I felt peace that pretty afternoon and I can still feel this feeling now.
Get close to the nature and take a breath, you'll find it's pretty cool. Smelly.