Add spring 2019 colors

[atelierbram]

Can the missing colors from the new Spring/Summer 2019 report be added?

• Terrarium Moss: #616247
• Pepper Stem: #8d9440
• Sweet Corn: #f2edd7
• Brown Granite: #615550

I would make a pull request if there was some templating setup on this project, in which there was just one place to put those values in …