Chroma Calendar wins Congressional App Challenge


By Emerald Green

Celebrating their Congressional App Challenge win, members of the Chroma Calendar team pose with Congresswoman Jacky Rosen on Monday, Dec. 3.

Four local students met with Congresswoman Jacky Rosen on Monday, Dec. 3 to receive certificates for winning the Congressional App Challenge. Brothers Daniel Kyong, sophomore, and Thomas Kyong, senior, Gaelan Chen, senior, and Mia Lorenzo, junior from Clark High School, created the app, Chroma Calendar, to assist the color-blind.

“It was pretty sweet,” Thomas said. “We got to meet Congresswoman Jacky Rosen and her team at her office. She was simply brilliant and charismatic. I really enjoyed meeting her and talking with her. It was truly a remarkable experience.”

Rosen introduced herself, asked them about their inspiration for creating the app and shared her experiences as a programmer before she became involved in politics. After that, she handed certificates to each of the individual members of the Chroma Calendar team, and everyone took turns taking photos with her and each other.

“It also felt good to win and meet Jacky Rosen because it was everybody’s first app,” Daniel said. “I had to learn code for the first time because I’ve never done anything like this before.”

Chen was the only one with any previous coding experience but had to learn app development and a whole new programming language, Swift, and xCode, the free software Apple provides, to complete this project.

“I could have coded an app at any time in my life because the tools are open and free to use, but the pressure of making something for a competition really engaged me,” Chen said. “Working with Thomas, Daniel, and Mia felt similar to a school project, except one where ‘the teacher’ lets us pick our groups. We had a good time, but I was mostly focused on creating the app.”

The four made the app with the full intention of winning the competition. Most of the ideas they had originally brainstormed weren’t possible because of programming difficulties. They targeted color blindness because it was a relatively prevalent disability that they could address. The Kyongs researched color blindness and what is difficult for color-blind users to see so that they could minimize visual ambiguity in the app. There are multiple types of color blindness, so the team had to program the theme and template of the app to fit color blindness universally.

“Creating an app with the mindset of aiding those who are handicapped promotes developer awareness of tech users with disabilities,” Chen said. “I, myself, think more consciously about how disabled users utilize a service because of this experience.”

The Kyongs and Lorenzo created wireframes (basic illustrations of what screens will look like) for the app. The three of them also worked on creating the website. Chen, then, implemented the wireframes in Swift, and Lorenzo worked on graphics for the app. The four collaborated every Sunday over the summer.

“It was very easy communicating and working with each other because I was already friends with Thomas and Daniel, and I became friends with Gaelen, too,” Lorenzo said. “It feels great to win the competition because we worked on the app for months, and our hard work paid off.”

Next year, the Chroma Calendar crew will venture to Washington, D.C. where they will present their app to Congress. The official awards ceremony will be held on Wednesday, April 3, and their program will be on display at Congress for an entire year.


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Senior and Co-Editor-In-Chief for “The Roar,” Emerald Green is an introspective girl with a sense of humor. Her favorite subject is English because it comes naturally to her and teaches her how to express herself more efficiently when communicating with others, for one of her biggest fears is being misunderstood. She enjoys having insightful conversations with others because she believes that reflecting on other perspectives is one of the best ways she can grow as a person. When she’s not concentrating on school work, she spends her time sketching, reading, and mostly binge-watching, but she has the most fun spending time with her closest friends. Her idols include her parents, Michael Cera, Ellen DeGeneres, Chris Evans, Zendaya, and Zoe Saldana; her favorite comedian is John Mulaney. Emerald plans on pursuing stand-up comedy and a career that involves writing in the entertainment industry.