How do I change the color of leaves?

Doesn't work

package com.Egietje.degeweldigemod.biome;

import java.util.Random;

import com.Egietje.degeweldigemod.entities.cheesecow.EntityCheeseCow;
import com.Egietje.degeweldigemod.init.CheeseBlocks;

import net.minecraft.block.BlockDoublePlant;
import net.minecraft.block.BlockFlower;
import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.passive.EntityHorse;
import net.minecraft.init.Biomes;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
import net.minecraft.world.biome.Biome;
import net.minecraft.world.gen.feature.WorldGenAbstractTree;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

public class BiomeCheese extends Biome {

public BiomeCheese(Biome.BiomeProperties properties) {
	super(properties);
	this.spawnableCreatureList.add(new Biome.SpawnListEntry(EntityCheeseCow.class, 8, 4, 4));
	this.theBiomeDecorator.treesPerChunk = 1;
	this.theBiomeDecorator.field_189870_A = 0.05F;
	this.theBiomeDecorator.flowersPerChunk = 5;
	this.theBiomeDecorator.grassPerChunk = 7;
	this.topBlock = CheeseBlocks.CHEESE_GRASS.getDefaultState();
	this.fillerBlock = CheeseBlocks.CHEESE_DIRT.getDefaultState();
}

@Override
public int getGrassColorAtPos(BlockPos pos) {
	return 0xD6FF42;
}

@Override
public int getFoliageColorAtPos(BlockPos pos) {
	return 0xD6FF42;
}

public BlockFlower.EnumFlowerType pickRandomFlower(Random rand, BlockPos pos) {
	double d0 = GRASS_COLOR_NOISE.getValue((double) pos.getX() / 200.0D, (double) pos.getZ() / 200.0D);

	if (d0 < -0.8D) {
		int j = rand.nextInt(4);

		switch (j) {
		case 0:
			return BlockFlower.EnumFlowerType.ORANGE_TULIP;
		case 1:
			return BlockFlower.EnumFlowerType.RED_TULIP;
		case 2:
			return BlockFlower.EnumFlowerType.PINK_TULIP;
		case 3:
		default:
			return BlockFlower.EnumFlowerType.WHITE_TULIP;
		}
	} else if (rand.nextInt(3) > 0) {
		int i = rand.nextInt(3);
		return i == 0 ? BlockFlower.EnumFlowerType.POPPY
				: (i == 1 ? BlockFlower.EnumFlowerType.HOUSTONIA : BlockFlower.EnumFlowerType.OXEYE_DAISY);
	} else {
		return BlockFlower.EnumFlowerType.DANDELION;
	}
}

public void decorate(World worldIn, Random rand, BlockPos pos) {
	double d0 = GRASS_COLOR_NOISE.getValue((double) (pos.getX() +  / 200.0D, (double) (pos.getZ() +  / 200.0D);

	if (d0 < -0.8D) {
		this.theBiomeDecorator.flowersPerChunk = 15;
		this.theBiomeDecorator.grassPerChunk = 5;
	} else {
		this.theBiomeDecorator.flowersPerChunk = 4;
		this.theBiomeDecorator.grassPerChunk = 10;
		DOUBLE_PLANT_GENERATOR.setPlantType(BlockDoublePlant.EnumPlantType.GRASS);

		for (int i = 0; i < 7; ++i) {
			int j = rand.nextInt(16) + 8;
			int k = rand.nextInt(16) + 8;
			int l = rand.nextInt(worldIn.getHeight(pos.add(j, 0, k)).getY() + 32);
			DOUBLE_PLANT_GENERATOR.generate(worldIn, rand, pos.add(j, l, k));
		}
	}

	super.decorate(worldIn, rand, pos);
}

@Override
public void addDefaultFlowers() {
	BlockFlower red = net.minecraft.init.Blocks.RED_FLOWER;
	BlockFlower yel = net.minecraft.init.Blocks.YELLOW_FLOWER;
	addFlower(red.getDefaultState().withProperty(red.getTypeProperty(), BlockFlower.EnumFlowerType.ORANGE_TULIP),
			3);
	addFlower(red.getDefaultState().withProperty(red.getTypeProperty(), BlockFlower.EnumFlowerType.RED_TULIP), 3);
	addFlower(red.getDefaultState().withProperty(red.getTypeProperty(), BlockFlower.EnumFlowerType.PINK_TULIP), 3);
	addFlower(red.getDefaultState().withProperty(red.getTypeProperty(), BlockFlower.EnumFlowerType.WHITE_TULIP), 3);
	addFlower(red.getDefaultState().withProperty(red.getTypeProperty(), BlockFlower.EnumFlowerType.POPPY), 20);
	addFlower(red.getDefaultState().withProperty(red.getTypeProperty(), BlockFlower.EnumFlowerType.HOUSTONIA), 20);
	addFlower(red.getDefaultState().withProperty(red.getTypeProperty(), BlockFlower.EnumFlowerType.OXEYE_DAISY),
			20);
	addFlower(yel.getDefaultState().withProperty(yel.getTypeProperty(), BlockFlower.EnumFlowerType.DANDELION), 30);
}

public WorldGenAbstractTree genBigTreeChance(Random rand) {
	return (WorldGenAbstractTree) (rand.nextInt(3) == 0 ? BIG_TREE_FEATURE : TREE_FEATURE);
}
}

It has a custom grass block so I now I'm in my biome

The (vanilla) grass is working but the leaves aren't

My custom grass doesn't have to be colored