[MCPE-117516] Sign colored text is too dark

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Compared to java, the colored text of a sign is too dark (using dyes or §, but only for signs placed in 1.16.220 or later). It almost appears black when you have low brightness.

Steps to Reproduce:

Write in a sign (preferably birch, to have contrast)
Apply any color of dye

Observed Results:
The color is almost indistinguishable from normal, black text.

Expected Results:
The color should be a little more bright so you can make out what color has been used.

Notes: The glow ink sac effect is good, but on Java its not required to identify the color of the text.