Soo Yeak,
ou could approach either the airline medical department, or the civil aviation body in the country of the airline you are applying to, and ask if it is permissible to take a lantern test for colour vision, rather than Ishihara plates (coloured dot picture) test. In many countries a pilot applicant failing this test is permitted to take the lantern test and many pass this one.
Best to do would be to approach an opthalmologist to determine your level of visual acuity and colour blindness (if you have not already) and see where you sit on the scale when compared to the minimum acceptable for each airline.
Some are stricter than others depending on the overseeing government body.
Good luck.