BBC News Program
Whether it’s trying to mask blemishes, matching your foundation to your skin tone, or creating a bold eye look, picking the right color is an important part of makeup.
But what if you can't tell some of them?
This is what McBride works as a makeup artist in part of the colors.
It was not until a few years ago that the 20-year-old discovered that he had this condition, also known as Colorful Deficiency.
But she said it ran in the family - father and sister were in full color.
"Being a makeup artist is hard for me," Ailish told the BBC Newsbeat.
"Red and orange are the same for me, and I think gray is gray," she said.
This makes mixing purple especially tricky, and she also has difficulty seeing soft colors.
The cosmetics student from Belfast played a role in the latest series of BBC III, where she was open to her situation.
The show, hosted by model Leomie Anderson, sees 10 contestants from across the UK fighting the country’s next makeup star through weekly industry tasks and creative summary.
“I didn’t see my color blindness as a setback in the game because I know my skills,” Eilish said.
“In some cases, it’s a little tricky, but I’m proud of the way I work.”
In the first episode, Ailish decides not to back down, experimenting with the explosion of colors inspired by his own creativity.
"I like to challenge myself," she said. "I don't like to settle in a small box.
“I want to show people that even if you are in color, you can still do a bold, bold, creative look.”
In the first episode, Judge Val Garland and Dominic Skinner said her final look was flat and simple, and the dungeon eventually landed in front of her and played against contestant Joe Tiernan to keep the game going.
But, Val told her: "I think the great color is the color, it's so color".
“It shows a very determined makeup artist.”
Ailish thinks she can perform her appearance after learning more about color theory, helping her understand how to mix the shadows she needs together.
Additionally, after a few years of freelance in the industry, she was used to marking all palettes with the names of the corresponding colors.
It is estimated that according to color blindness, about 3 million people living in the UK are affected by color blindness.
It affects more men than women - about one in 10 men suffer from illness, and 1 in women.
The NHS said it is incurable and it is not clear what causes it, but it usually runs in the home and is something people are born and adapted to.
Ailish became the second MUA to leave the game on Wednesday after finding herself sitting in a red chair and risking being eliminated for two weeks in a row.
She was emotional in the second episode and needed a hug after her expression failed to impress.
“I feel very anxious,” Eilish told Newsbeat.
“It was overwhelming at the time and I really put myself in trouble during the show.”
But Ailish is still proud to even show it on Glow, a dream she has since watched the 14-year-old show for the first time.
After her recent degree, she looks forward to pursuing more goals by working in films and theaters.
While she may not have one in the series 7, when she begins this new chapter, Ailish asks: "Can I get a jingle?!"
Glow: The next makeup star in the UK is about to appear BBC three points On Wednesdays, available Upstream on BBC iPlayer.
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