Here are my first 3 trials:
Trial #1 and #2 have the correct hue. Trial #2 has the correct value, but a little too much chroma. Trial #3 has the correct value and chroma, but the color shifted toward yellow. The small amount of navy lowered the scarlet chroma value almost 6 steps. I think I should add a small amount of navy to the combination of scarlet and fuchsia in trial #2. I will also decrease the depth of shade from Trial #2 a little to compensate for the deep value of the navy. I wonder if the 1% of the navy will shift the color too much toward the yellow with the fuchsia in the formula?
Formulas to try:
Trial #4
2.4% DOS
66.5% Scarlet
32.5% Fuchsia
1% Navy
Trial #5
2.2% DOS
66.5% Scarlet
32.5% Fuchsia
1% Navy
Trial #6
2.0% DOS
66.5% Scarlet
32.5% Fuchsia
1% Navy
Trial #7
2.2% DOS
66.75% Scarlet
32.75% Fuchsia
.50% Navy