I'm not entirely sure as it seems like a rather unique and perhaps not a common phrase. It could potentially mean'my love in color comes out as a visual novel' but this is a very rough interpretation.
Kimi ni Todoke's manga has a conclusive ending that isn't sudden or out of the blue. The narrative progresses smoothly towards its finale, leaving no major loose ends and providing closure for the readers.
Well, the 'Kimi ni Todoke light novel' is special for its detailed character development. The author takes the time to really build up the personalities of the characters, making them feel very real. For example, the way the protagonist overcomes her shyness is depicted in a very relatable way. It also has a unique art of storytelling that keeps readers engaged from start to finish.
In 'Kimi ni Todoke light novel', the central figure is Sawako Kuronuma. She's an introverted girl with a gentle heart but is feared by her classmates due to her looks. Shota Kazehaya plays a crucial role too. He's the popular guy who is the first to reach out to Sawako and befriends her. There are also other characters like Ayane Yano and Chizuru Yoshida who become Sawako's friends and are important in her journey of opening up and finding her place among her peers.
One funny story from 'Kimi ni Todoke' could be when Sawako tries to interact with her classmates in a more outgoing way. For example, when she attempts to join in on a group conversation and ends up saying something really innocent but it comes out in a hilarious way that makes everyone laugh instead of being scared of her as they used to be.
The Kimi ni Todoke anime is generally quite faithful to the manga. There might be some tweaks for the sake of animation or to better fit the pacing, but the core story and characters remain consistent.
I'm not aware of any specific visual novels directly related to this exact phrase. But there are many visual novels that deal with themes of love and color in a sense. For example, 'Clannad' has a lot of themes about different types of love and the world around the characters which could be seen as having a form of 'iro' or color in terms of the emotions and experiences.