First you need to add more layers into your design. Yes, layering is important in this design but you need to remember to keep it simple. But do not worry as the layers will give to chance to make the room appear cozier. It will also prevent the room from feeling too cold.
Next is to add more details such as texture. It is important since the detail will give your design more value. Especially if you do it in layers which means a lot more texture could be added. This will also give the design more warmth which is another thing that you want to add.
For the color scheme, you need to use subtle colors which usually come from nature. This will give your design some harmony with the nature which is another thing that the design wants to achieve.
Create calming visual by using grey or white color on the wall as the background. Then you can add colors on the layers with natural scheme such as green, blue, pink, mustard and so on. Do not forget to add some plants to get the real natural feeling into the room.
Create the right atmosphere with the lighting that you use in the living room. It is better when the room has a lot of lights especially during the winter months. Use multi directional lights to spread the lights throughout the room. Usually, warm tone lighting is more suitable since this design is all about warm feeling. Here are some Scandinavian living room that you can use as design ideas with awesome appearance.
image source : pinterest.com