I agree with you on the color as well. Since early dashboards that were published at the beginning of pandemic. The colors were too harsh to the eyes and scared people by colors intensity.
One more thing I would like to add is about language:
If they want to use transliterated words, it should be all transliterated words. But the above dashboard reported “Jun” instead of “มิ.ย.” in Thai. For those who don’t understand English will not be able to know what does it mean.
In addition, they use both “เข็ม = injection” and dose in the same box of cumulative vaccination record. Instead they should decide to use just either injection or dose.