To mix a new color in Java we can say :
Color c= new Color(20,59,123); // mix of Red Green and Blue
then
page.setColor(c);

Some Common Colors are listed below :
Color Name RGB CODE HEX # Sample
Snow 255-250-250 fffafa  
Snow 2 238-233-233 eee9e9  
Snow 3 205-201-201 cdc9c9  
Snow 4 139-137-137 8b8989  
Ghost White 248-248-255 f8f8ff  
White Smoke 245-245-245 f5f5f5  
Gainsboro 220-220-220 dccdc  
Floral White 255-250-240 fffaf0  
Old Lace 253-245-230 fdf5e6  
Linen 240-240-230 faf0e6  
Antique White 250-235-215 faebd7  
Antique White 2 238-223-204 eedfcc  
Antique White 3 205-192-176 cdc0b0  
Antique White 4 139-131-120 8b8378  
Papaya Whip 255-239-213 ffefd5  
Blanched Almond 255-235-205 ffebcd  
Bisque 255-228-196 ffe4c4  
Bisque 2 238-213-183 eed5b7  
Bisque 3 205-183-158 cdb79e  
Bisque 4 139-125-107 8b7d6b  
Peach Puff 255-218-185 ffdab9  
Peach Puff 2 238-203-173 eecbad  
Peach Puff 3 205-175-149 cdaf95  
Peach Puff 4 139-119-101 8b7765  
Navajo White 255-222-173 ffdead  
Moccasin 255-228-181 ffe4b5  
Cornsilk 255-248-220 fff8dc  
Cornsilk 2 238-232-205 eee8dc  
Cornsilk 3 205-200-177 cdc8b1  
Cornsilk 4 139-136-120 8b8878  
Ivory 255-255-240 fffff0  
Ivory 2 238-238-224 eeeee0  
Ivory 3 205-205-193 cdcdc1  
Ivory 4 139-139-131 8b8b83  
Lemon Chiffon 255-250-205 fffacd  
Seashell 255-245-238 fff5ee  
Seashell 2 238-229-222 eee5de  
Seashell 3 205-197-191 cdc5bf  
Seashell 4 139-134-130 8b8682  
Honeydew 240-255-240 f0fff0  
Honeydew 2 244-238-224 e0eee0  
Honeydew 3 193-205-193 c1cdc1  
Honeydew 4 131-139-131 838b83  
Mint Cream 245-255-250 f5fffa  
Azure 240-255-255 f0ffff  
Alice Blue 240-248-255 f0f8ff  
Lavender 230-230-250 e6e6fa  
Lavender Blush 255-240-245 fff0f5  
Misty Rose 255-228-225 ffe4e1  
White 255-255-255 ffffff  

Grays

Color Name RGB CODE HEX # Sample
Black 0-0-0 000000  
Dark Slate Gray 49-79-79 2f4f4f  
Dim Gray 105-105-105 696969  
Slate Gray 112-138-144 708090  
Light Slate Gray 119-136-153 778899  
Gray 190-190-190 bebebe  
Light Gray 211-211-211 d3d3d3  

Blues

Color Name RGB CODE HEX # Sample
Midnight Blue 25-25-112 191970  
Navy 0-0-128 000080  
Cornflower Blue 100-149-237 6495ed  
Dark Slate Blue 72-61-139 483d8b  
Slate Blue 106-90-205 6a5acd  
Medium Slate Blue 123-104-238 7b68ee  
Light Slate Blue 132-112-255 8470ff  
Medium Blue 0-0-205 0000cd  
Royal Blue 65-105-225 4169e1  
Blue 0-0-255 0000ff  
Dodger Blue 30-144-255 1e90ff  
Deep Sky Blue 0-191-255 00bfff  
Sky Blue 135-206-250 87ceeb  
Light Sky Blue 135-206-250 87cefa  
Steel Blue 70-130-180 4682b4  
Light Steel Blue 176-196-222 b0c4de  
Light Blue 173-216-230 add8e6  
Powder Blue 176-224-230 b0e0e6  
Pale Turquoise 175-238-238 afeeee  
Dark Turquoise 0-206-209 00ced1  
Medium Turquoise 72-209-204 48d1cc  
Turquoise 64-224-208 40e0d0  
Cyan 0-255-255 00ffff  
Light Cyan 224-255-255 e0ffff  
Cadet Blue 95-158-160 5f9ea0  

Greens

Color Name RGB CODE HEX # Sample
Medium Aquamarine 102-205-170 66cdaa  
Aquamarine 127-255-212 7fffd4  
Dark Green 0-100-0 006400  
Dark Olive Green 85-107-47 556b2f  
Dark Sea Green 143-188-143 8fbc8f  
Sea Green 46-139-87 2e8b57  
Medium Sea Green 60-179-113 3cb371  
Light Sea Green 32-178-170 20b2aa  
Pale Green 152-251-152 98fb98  
Spring Green 0-255-127 00ff7f  
Lawn Green 124-252-0 7cfc00  
Chartreuse 127-255-0 7fff00  
Medium Spring Green 0-250-154 00fa9a  
Green Yellow 173-255-47 adff2f  
Lime Green 50-205-50 32cd32  
Yellow Green 154-205-50 9acd32  
Forest Green 34-139-34 228b22  
Olive Drab 107-142-35 6b8e23  
Dark Khaki 189-183-107 bdb76b  
Khaki 240-230-140 f0e68c  

Yellow

Color Name RGB CODE HEX # Sample
Pale Goldenrod 238-232-170 eee8aa  
Light Goldenrod Yellow 250-250-210 fafad2  
Light Yellow 255-255-224 ffffe0  
Yellow 255-255-0 ffff00  
Gold 255-215-0 ffd700  
Light Goldenrod 238-221-130 eedd82  
Goldenrod 218-165-32 daa520  
Dark Goldenrod 184-134-11 b8860b  

Browns

Color Name RGB CODE HEX # Sample
Rosy Brown 188-143-143 bc8f8f  
Indian Red 205-92-92 cd5c5c  
Saddle Brown 139-69-19 8b4513  
Sienna 160-82-45 a0522d  
Peru 205-133-63 cd853f  
Burlywood 222-184-135 deb887  
Beige 245-245-220 f5f5dc  
Wheat 245-222-179 f5deb3  
Sandy Brown 244-164-96 f4a460  
Tan 210-180-140 d2b48c  
Chocolate 210-105-30 d2691e  
Firebrick 178-34-34 b22222  
Brown 165-42-42 a52a2a  

Oranges

Color Name RGB CODE HEX # Sample
Dark Salmon 233-150-122 e9967a  
Salmon 250-128-114 fa8072  
Light Salmon 255-160-122 ffa07a  
Orange 255-165-0 ffa500  
Dark Orange 255-140-0 ff8c00  
Coral 255-127-80 ff7f50  
Light Coral 240-128-128 f08080  
Tomato 255-99-71 ff6347  
Orange Red 255-69-0 ff4500  
Red 255-0-0 ff0000  

Pinks/Violets

Color Name RGB CODE HEX # Sample
Hot Pink 255-105-180 ff69b4  
Deep Pink 255-20-147 ff1493  
Pink 255-192-203 ffc0cb  
Light Pink 255-182-193 ffb6c1  
Pale Violet Red 219-112-147 db7093  
Maroon 176-48-96 b03060  
Medium Violet Red 199-21-133 c71585  
Violet Red 208-32-144 d02090  
Violet 238-130-238 ee82ee  
Plum 221-160-221 dda0dd  
Orchid 218-112-214 da70d6  
Medium Orchid 186-85-211 ba55d3  
Dark Orchid 153-50-204 9932cc  
Dark Violet 148-0-211 9400d3  
Blue Violet 138-43-226 8a2be2  
Purple 160-32-240 a020f0  
Medium Purple 147-112-219 9370db  
Thistle 216-191-216 d8bfd8