Lots of drill holes in wall... how to fill?

Hi Crushing the bricks will make the cement textured and harder to fill smoothly, i would go for a cement dye to match the brick colour

crushing the bricks wont really make the mortar change colour to match. imagine putting crushed biscuits into ice cream, the colour will stay the same, but the texture will change. best option would be to try a mortar dye, but you would be lucky to get a good match since dyes only come in black, brown, red and yellow from what i know of. regarding the crushed brick idea. i suppose if you crushed up enough to get a decent amount of dust you could buy some special cement what is called snowcrete. unlike the regular grey cement, snowcrete is white and is used more for specialist brickwork like when installing stone fireplaces etc. white cement is a better way to go if you are wanting to mix in some brick dust because it is more likely to darken like you want.