12-11-2016, 06:26 AM
As Espermaschine said you probably had the wrong layer selected.
In Gimp there is usually more than one way to achieve something. Here is another method.
1. Select South America. Use the Free Select tool and keep your selection out in the white sea.
2. Select the Select By Colour tool. In the tool options set the Mode to Intersect With Current Selection - the 4th option
3. Click on the green inside South Amerca. The green in South America is selected, the white lines are excluded.
4. Set the foreground colour to the blue that you want.
5. Bucket fill the selection with blue.
In Gimp there is usually more than one way to achieve something. Here is another method.
1. Select South America. Use the Free Select tool and keep your selection out in the white sea.
2. Select the Select By Colour tool. In the tool options set the Mode to Intersect With Current Selection - the 4th option
3. Click on the green inside South Amerca. The green in South America is selected, the white lines are excluded.
4. Set the foreground colour to the blue that you want.
5. Bucket fill the selection with blue.