I don't think hexediting the game to change the actual colours would work; there's no one value to modify: it's a big messy function with lots of preset values.
What you COULD do is hexedit those values, if you can somehoe figure out where they are. But I wouldn't know where to start and it's probably not a good idea.
Anyway, here's the function where it happens:
void Graphics::setcol( int t, UtilityClass& help )
{
int temp;
//Setup predefinied colours as per our zany palette
switch(t)
{
//Player Normal
case 0:
ct.colour = getRGB(160- help.glow/2 - (fRandom()*20), 200- help.glow/2, 220 - help.glow);
break;
//Player Hurt
case 1:
ct.colour = getRGB(196 - (fRandom() * 64), 10, 10);
break;
//Enemies and stuff
case 2:
ct.colour = getRGB(225-(help.glow/2), 75, 30);
break;
case 3: //Trinket
if (!trinketcolset)
{
trinketr = 200 - (fRandom() * 64);
trinketg = 200 - (fRandom() * 128);
trinketb = 164 + (fRandom() * 60);
trinketcolset = true;
}
ct.colour = getRGB(trinketr, trinketg, trinketb);
break;
case 4: //Inactive savepoint
temp = (help.glow/2) + (fRandom() * 8);
ct.colour = getRGB(80 + temp, 80 + temp, 80 + temp);
break;
case 5: //Active savepoint
ct.colour = getRGB(164+(fRandom()*64),164+(fRandom()*64), 255-(fRandom()*64));
break;
case 6: //Enemy : Red
ct.colour = getRGB(250 - help.glow/2, 60- help.glow/2, 60 - help.glow/2);
break;
case 7: //Enemy : Green
ct.colour = getRGB(100 - help.glow/2 - (fRandom()*30), 250 - help.glow/2, 100 - help.glow/2 - (fRandom()*30));
break;
case 8: //Enemy : Purple
ct.colour = getRGB(250 - help.glow/2, 20, 128 - help.glow/2 + (fRandom()*30));
break;
case 9: //Enemy : Yellow
ct.colour = getRGB(250 - help.glow/2, 250 - help.glow/2, 20);
break;
case 10: //Warp point (white)
ct.colour = getRGB(255 - (fRandom() * 64), 255 - (fRandom() * 64), 255 - (fRandom() * 64));
break;
case 11: //Enemy : Cyan
ct.colour = getRGB(20, 250 - help.glow/2, 250 - help.glow/2);
break;
case 12: //Enemy : Blue
ct.colour = getRGB(90- help.glow/2, 90 - help.glow/2, 250 - help.glow/2);
break;
//Crew Members
//green
case 13:
ct.colour = getRGB(120- help.glow/4 - (fRandom()*20), 220 - help.glow/4, 120- help.glow/4);
break;
//Yellow
case 14:
ct.colour = getRGB(220- help.glow/4 - (fRandom()*20), 210 - help.glow/4, 120- help.glow/4);
break;
//pink
case 15:
ct.colour = getRGB(255 - help.glow/8, 70 - help.glow/4, 70 - help.glow / 4);
break;
//Blue
case 16:
ct.colour = getRGB(75, 75, 255- help.glow/4 - (fRandom()*20));
break;
case 17: //Enemy : Orange
ct.colour = getRGB(250 - help.glow/2, 130 - help.glow/2, 20);
break;
case 18: //Enemy : Gray
ct.colour = getRGB(130- help.glow/2, 130 - help.glow/2, 130 - help.glow/2);
break;
case 19: //Enemy : Dark gray
ct.colour = getRGB(60- help.glow/8, 60 - help.glow/8, 60 - help.glow/8);
break;
//Purple
case 20:
ct.colour = getRGB(220 - help.glow / 4 - (fRandom() * 20), 120 - help.glow / 4, 210 - help.glow / 4);
break;
case 21: //Enemy : Light Gray
ct.colour = getRGB(180- help.glow/2, 180 - help.glow/2, 180 - help.glow/2);
break;
case 22: //Enemy : Indicator Gray
ct.colour = getRGB(230- help.glow/2, 230- help.glow/2, 230- help.glow/2);
break;
case 23: //Enemy : Indicator Gray
ct.colour = getRGB(255- help.glow/2 - (fRandom() * 40) , 255- help.glow/2 - (fRandom() * 40), 255- help.glow/2 - (fRandom() * 40));
break;
//Trophies
//cyan
case 30:
ct.colour = RGBf(160, 200, 220);
break;
//Purple
case 31:
ct.colour = RGBf(220, 120, 210);
break;
//Yellow
case 32:
ct.colour = RGBf(220, 210, 120);
break;
//red
case 33:
ct.colour = RGBf(255, 70, 70);
break;
//green
case 34:
ct.colour = RGBf(120, 220, 120);
break;
//Blue
case 35:
ct.colour = RGBf(75, 75, 255);
break;
//Gold
case 36:
ct.colour = getRGB(180, 120, 20);
break;
case 37: //Trinket
if (!trinketcolset)
{
trinketr = 200 - (fRandom() * 64);
trinketg = 200 - (fRandom() * 128);
trinketb = 164 + (fRandom() * 60);
trinketcolset = true;
}
ct.colour = RGBf(trinketr, trinketg, trinketb);
break;
//Silver
case 38:
ct.colour = RGBf(196, 196, 196);
break;
//Bronze
case 39:
ct.colour = RGBf(128, 64, 10);
break;
//Awesome
case 40: //Teleporter in action!
temp = fRandom() * 150;
if(temp<33)
{
ct.colour = RGBf(255 - (fRandom() * 64), 64 + (fRandom() * 64), 64 + (fRandom() * 64));
}
else if (temp < 66)
{
ct.colour = RGBf(64 + (fRandom() * 64), 255 - (fRandom() * 64), 64 + (fRandom() * 64));
}
else if (temp < 100)
{
ct.colour = RGBf(64 + (fRandom() * 64), 64 + (fRandom() * 64), 255 - (fRandom() * 64));
}
else
{
ct.colour = RGBf(164+(fRandom()*64),164+(fRandom()*64), 255-(fRandom()*64));
}
break;
case 100: //Inactive Teleporter
temp = (help.glow/2) + (fRandom() * 8);
ct.colour = getRGB(42 + temp, 42 + temp, 42 + temp);
break;
case 101: //Active Teleporter
ct.colour = getRGB(164+(fRandom()*64),164+(fRandom()*64), 255-(fRandom()*64));
break;
case 102: //Teleporter in action!
temp = fRandom() * 150;
if(temp<33)
{
ct.colour = getRGB(255 - (fRandom() * 64), 64 + (fRandom() * 64), 64 + (fRandom() * 64));
}
else if (temp < 66)
{
ct.colour = getRGB(64 + (fRandom() * 64), 255 - (fRandom() * 64), 64 + (fRandom() * 64));
}
else if (temp < 100)
{
ct.colour = getRGB(64 + (fRandom() * 64), 64 + (fRandom() * 64), 255 - (fRandom() * 64));
}
else
{
ct.colour = getRGB(164+(fRandom()*64),164+(fRandom()*64), 255-(fRandom()*64));
}
break;
default:
ct.colour = 0xFFFFFF;
break;
}
//ct.color = endian_swap(ct.color);
}