Hi, over the past months I have seen many videos of Designers using https://thecolorpalettestudio.com/ I was excited to try it out myself but found out it costs almost 100$. I particulary liked the color contrast feature which let's you check many color combinations at once while also recommending alternatives. All the other websites I found only lets you check two colors at once and rarely provides any improvement ideas.

Background (in case anyone wants to help me a bit further): I'm currently working on a brand identity for a school. I used three bright colors as my main. Yellow (F2E038), Magenta (EF81CA) and turquoise (12D6B9). Additionaly a beige (FBFFEB). The contrast between those colors is very poor, so I'm looking for a way to improve it. How do I gain accessibility without completely changing all of my colors and loosing my initial idea of a fun and bright concept?

Thank you in advance! :)