The photos of these color samples are meant to provide an overview of how each color behave in mixes.
The first two samples are base colour. The next 9 samples are the base color added increasing amounts of white indicated above each color.
The last 4 samples are equal amounts of base color and a contrasting color mixed in two variants . The two are mixed in two variations with white.
Winsor and Newton Professional Acrylic Colour

229 - Dioxazine Purple
X1: 111 - Cadmium Yellow Deep
X2: 25 - Bismuth Yellow
Transparency: T
Permanence: A
Colour Index Name: PV23

470 - Perylene Violet
X1: 86 - Cadmium Lemon
X2: 25 - Bismuth Yellow Transparency: T
Permanence: A
Colour Index Name: PV29

545 - Quinacridone Magenta
X1: 111 - Cadmium Yellow Deep
X2: 25 - Bismuth Yellow
Transparency: O
Permanence: A
Colour Index Name: PV19

550 - Quinacridone Violet
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: A
Colour Index Name: PR122

466 - Permanent Alizarin Crimson
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: A
Colour Index Name: PR177, PV23

97 - Cadmium Red Deep
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PR108

97 - Cadmium Red Deep Grey
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PR108

99 - Cadmium Red Medium
X1: 86 - Cadmium Lemon
X2: 664 - Ultramarine Blue
Transparency: O
Permanence: A
Colour Index Name: PR108

99 - Cadmium Red Medium Grey
X1: 86 - Cadmium Lemon
X2: 664 - Ultramarine Blue
Transparency: O
Permanence: A
Colour Index Name: PR108

100 - Cadmium Red Light
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PR108

100 - Cadmium Red Light Grey
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PR108

536 - Pyrrole Red Light
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PR255

536 - Pyrrole Red Light Grey
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PR255

534 - Pyrrole Red
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PR254

534 - Pyrrole Red Grey
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PR254

464 - Perylene Red
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: A
Colour Index Name: PR149

464 - Perylene Red Grey
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: A
Colour Index Name: PR149

423 - Naphthol Red Medium
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: ST
Permanence: A
Colour Index Name: PR170

423 - Naphthol Red Medium Grey
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: ST
Permanence: A
Colour Index Name: PR170

421 - Naphthol Red Light
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: ST
Permanence: A
Colour Index Name: PR112

421 - Naphthol Red Light Grey
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: ST
Permanence: A
Colour Index Name: PR112

548 - Quinacridone Red
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: A
Colour Index Name: PR209

548 - Quinacridone Red Grey
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: A
Colour Index Name: PR209

519 - Pyrrole Orange
X1: 515 - Phthalo Blue (Green Shade)
X2: 514 - Phthalo Blue (Red Shade)
Transparency: ST
Permanence: A
Colour Index Name: PO73

519 - Pyrrole Orange Grey
X1: 515 - Phthalo Blue (Green Shade)
X2: 514 - Phthalo Blue (Red Shade)
Transparency: ST
Permanence: A
Colour Index Name: PO73

89 - Cadmium Orange
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PO20

89 - Cadmium Orange Grey
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PO20

39 - Azo Yellow Deep
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: ST
Permanence: A
Colour Index Name: PY65

39 - Azo Yellow Deep Grey
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: ST
Permanence: A
Colour Index Name: PY65

111 - Cadmium Yellow Deep
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: O
Permanence: A
Colour Index Name: PY35, PO20

111 - Cadmium Yellow Deep Grey
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: O
Permanence: A
Colour Index Name: PY35, PO20

116 - Cadmium Yellow Medium
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: O
Permanence: A
Colour Index Name: PY35

116 - Cadmium Yellow Medium Grey
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: O
Permanence: A
Colour Index Name: PY35

19 - Azo Yellow Medium
X1: 664 - Ultramarine Blue
X2: 672 - Ultramarine Violet
Transparency: ST
Permanence: A
Colour Index Name: PY74

19 - Azo Yellow Medium Grey
X1: 664 - Ultramarine Blue
X2: 672 - Ultramarine Violet
Transparency: ST
Permanence: A
Colour Index Name: PY74

439 - Nickel Azo Yellow
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: O
Permanence: A
Colour Index Name: PY150

439 - Nickel Azo Yellow Grey
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: O
Permanence: A
Colour Index Name: PY150

25 - Bismuth Yellow
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: O
Permanence: A
Colour Index Name: PY184

25 - Bismuth Yellow Grey
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: O
Permanence: A
Colour Index Name: PY184

86 - Cadmium Lemon
X1: 99 - Cadmium Red Medium
X2: 664 - Ultramarine Blue
Transparency: T
Permanence: A
Colour Index Name: PY35

86 - Cadmium Lemon Grey
X1: 99 - Cadmium Red Medium
X2: 664 - Ultramarine Blue
Transparency: T
Permanence: A
Colour Index Name: PY35

346 - Lemon Yellow
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: ST
Permanence: A
Colour Index Name: PY3

346 - Lemon Yellow Grey
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: ST
Permanence: A
Colour Index Name: PY3

294 - Green Gold
X1: 362 - Light Red
X2: 421 - Naphthol Red Light
Transparency: T
Permanence: A
Colour Index Name: PY129

447 - Olive Green
X1: 464 - Perylene Red
X2: 466 - Permanent Alizarin Crimson
Transparency: O
Permanence: A
Colour Index Name: PBk9, PY129, PY139

503 - Permanent Sap Green
X1: 464 - Perylene Red
X2: 466 - Permanent Alizarin Crimson
Transparency: T
Permanence: A
Colour Index Name: PY83, PB15:3, PBk9

311 - Hooker's Green
X1: 464 - Perylene Red
X2: 466 - Permanent Alizarin Crimson
Transparency: T
Permanence: A
Colour Index Name: PY110, PG36

162 - Chromium Oxide Green
X1: 362 - Light Red
X2: 421 - Naphthol Red Light
Transparency: O
Permanence: AA
Colour Index Name: PG17

521 - Phthalo Green (Yellow Shade)
X1: 519 - Pyrrole Orange
X2: 89 - Cadmium Orange
Transparency: T
Permanence: A
Colour Index Name: PG36

522 - Phthalo Green (Blue Shade)
X1: 519 - Pyrrole Orange
X2: 89 - Cadmium Orange
Transparency: T
Permanence: A
Colour Index Name: PG7

184 - Cobalt Green
X1: 362 - Light Red
X2: 421 - Naphthol Red Light
Transparency: O
Permanence: AA
Colour Index Name: PG50

185 - Cobalt Green Deep
X1: 362 - Light Red
X2: 421 - Naphthol Red Light
Transparency: N/A
Permanence: AA
Colour Index Name: PG26

190 - Cobalt Turquoise
X1: 421 - Naphthol Red Light
X2: 362 - Light Red
Transparency: ST
Permanence: AA
Colour Index Name: PB36

526 - Phthalo Turquoise
X1: 519 - Pyrrole Orange
X2: 89 - Cadmium Orange
Transparency: T
Permanence: A
Colour Index Name: PB16

515 - Phthalo Blue (Green Shade)
X1: 519 - Pyrrole Orange
X2: 89 - Cadmium Orange
Transparency: T
Permanence: A
Colour Index Name: PB15:3

514 - Phthalo Blue (Red Shade)
X1: 519 - Pyrrole Orange
X2: 89 - Cadmium Orange
Transparency: T
Permanence: A
Colour Index Name: PB15:1

321 - Indanthrene Blue
X1: 464 - Perylene Red
X2: 466 - Permanent Alizarin Crimson
Transparency: N/A
Permanence: A
Colour Index Name: PB60

130 - Cerulean Blue Chromium
X1: 111 - Cadmium Yellow Deep
X2: 25 - Bismuth Yellow
Transparency: O
Permanence: AA
Colour Index Name: PB36

137 - Cerulean Blue
X1: 111 - Cadmium Yellow Deep
X2: 25 - Bismuth Yellow
Transparency: O
Permanence: AA
Colour Index Name: PB35

178 - Cobalt Blue
X1: 362 - Light Red
X2: 421 - Naphthol Red Light
Transparency: SO
Permanence: AA
Colour Index Name: PB28

664 - Ultramarine Blue
X1: 86 - Cadmium Lemon
X2: 99 - Cadmium Red Medium
Transparency: T
Permanence: A
Colour Index Name: PB29

180 - Cobalt Blue Deep
X1: 362 - Light Red
X2: 421 - Naphthol Red Light
Transparency: N/A
Permanence: AA
Colour Index Name: PB73

672 - Ultramarine Violet
X1: 111 - Cadmium Yellow Deep
X2: 25 - Bismuth Yellow
Transparency: T
Permanence: A
Colour Index Name: PV15

549 - Quinacridone Burnt Orange
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: O
Permanence: A
Colour Index Name: PR206

537 - Potter's Pink
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: SO
Permanence: AA
Colour Index Name: PR233

507 - Perylene Maroon
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: A
Colour Index Name: PR179

362 - Light Red
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: SO
Permanence: AA
Colour Index Name: PR102

74 - Burnt Sienna
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: AA
Colour Index Name: PR101

552 - Raw Sienna
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: AA
Colour Index Name: PY42, PR101

744 - Yellow Ochre
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: ST
Permanence: AA
Colour Index Name: PY43

425 - Naples Yellow Deep
X1: 137 - Cerulean Blue
X2: 229 - Dioxazine Purple
Transparency: O
Permanence: AA
Colour Index Name: PBr24

76 - Burnt Umber
X1: 311 - Hooker's Green
X2: 447 - Olive Green
Transparency: T
Permanence: AA
Colour Index Name: PBr7

554 - Raw Umber
X1: 464 - Perylene Red
X2: 466 - Permanent Alizarin Crimson
Transparency: T
Permanence: AA
Colour Index Name: PBr7

217 - Davy's Gray
X1: 421 - Naphthol Red Light
X2: 362 - Light Red
Transparency: T
Permanence: A
Colour Index Name: PY42, PBk19

460 - Perylene Green
X1: 464 - Perylene Red
X2: 466 - Permanent Alizarin Crimson
Transparency: T
Permanence: A
Colour Index Name: PBk31