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 - Designer's Gouache

086 Cadmium Lemon
X1:360 Light Purple
X2:625 Spectrum Violet
Transparency: O
Permanence: A
Colour Index Name: PY35

086 Cadmium Lemon/Grey
X1 360 Light Purple:
X2:625 Spectrum Violet
Transparency: O
Permanence: A
Colour Index Name: PY35

345 - Lemon Yellow
X1 360 Light Purple:
X2:625 Spectrum Violet
Transparency: SO
Permanence: A
Colour Index Name: PY3

345 - Lemon Yellow/ Grey
X1 360 Light Purple:
X2:625 Spectrum Violet
Transparency: SO
Permanence: A
Colour Index Name: PY3

527 - Primary Yellow
X1 360 Light Purple:
X2:625 Spectrum Violet
Transparency: SO
Permanence: A
Colour Index Name: PY74, PY138

527 - Primary Yellow/Grey
X1 360 Light Purple:
X2:625 Spectrum Violet
Transparency: SO
Permanence: A
Colour Index Name: PY74, PY138

425 - Naples Yellow Deep
X1 360 Light Purple:
X2:625 Spectrum Violet
Transparency: O
Permanence: AA
Colour Index Name: PBr24

108 - Cadmium Yellow
X1:360 Light Purple
X2:625 Spectrum Violet
Transparency: O
Permanence: A
Colour Index Name: PY35, PO20

108 - Cadmium Yellow/ Grey
X1:360 Light Purple
X2:625 Spectrum Violet
Transparency: O
Permanence: A
Colour Index Name: PY35, PO20

508 - Permanent Yellow Deep
X1:360 Light Purple
X2:625 Spectrum Violet
Transparency: SO
Permanence: A
Colour Index Name: PY65

508 - Permanent Yellow Deep /Grey
X1:360 Light Purple
X2:625 Spectrum Violet
Transparency: SO
Permanence: A
Colour Index Name: PY65

384 - Marigold Yellow
X1:360 Light Purple
X2:625 Spectrum Violet
Transparency: SO
Permanence: A
Colour Index Name: PO72, PO73

453 - Orange Lake Light
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: SO
Permanence: A
Colour Index Name: PY65, PR9

89 - Cadmium Orange
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PY35, PR108

89 - Cadmium Orange
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PY35, PR108

94 - Cadmium Red
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PR108

94 - Cadmium Red/ Grey
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PR108

106 - Cadmium Scarlet
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PR108

106 - Cadmium Scarlet/ Grey
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PR108

249 - Flame Red
X1: 137 Cerulean Blue
X2: 178 Cobalt Blue
Transparency: O
Permanence: A
Colour Index Name: PR170, PO72

249 - Flame Red/ Grey
X1: 137 Cerulean Blue
X2: 178 Cobalt Blue
Transparency: O
Permanence: A
Colour Index Name: PR170, PO72

623 - Spectrum Red
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PR170, PBr25

507 - Perylene Maroon
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PR179

004 Alizarin Crimson
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: SO
Permanence: B
Colour Index Name: PR83

524 - Primary Red
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: SO
Permanence: B
Colour Index Name: PR170

502 - Permanent Rose
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PV19

466 - Permanent Alizarin Crimson
X1: 527 Primary Yellow
x2: 508 Permanent Yellow Deep
Transparency: SO
Permanence: A
Colour Index Name: PR176

440 - Opera Pink
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: SO
Permanence: C
Colour Index Name: N/A

448 - Opera Rose
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: SO
Permanence: C
Colour Index Name: N/A

028 Bengal Rose
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: SO
Permanence: C
Colour Index Name: PR169

593 - Rose Tyrien
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: SO
Permanence: C
Colour Index Name: PR173

380 - Magenta
X1: 086 Cadmium Lemon
X2: 108 Cadmium Yellow
Transparency: ST
Permanence: C
Colour Index Name: PR173, PV2

050 Brilliant Red/Violet
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: SO
Permanence: B
Colour Index Name: PV1

052 Brilliant Violet
X1: 086 Cadmium Lemon
X2: 108 Cadmium Yellow
Transparency: O
Permanence: B
Colour Index Name: PB29, PV1

360 - Light Purple
X1: 527 Primary Yellow
X2: 508 Permanent Yellow Deep
Transparency: O
Permanence: B
Colour Index Name: PV2, PV, 3

733 - Winsor Violet (Dioxazine)
X1: 527 Primary Yellow
X2: 508 Permanent Yellow Deep
Transparency: O
Permanence: A
Colour Index Name: PV23

625 - Spectrum Violet
X1: 508 Permanent Yellow Deep
X2: 527 Primary Yellow
Transparency: O
Permanence: B
Colour Index Name: PV3

660 - Ultramarine
X1: 524 - Primary Red
X2: 384 Marigold Yellow
Transparency: O
Permanence: A
Colour Index Name: PB29

667 - Ultramarine Green Shade
X1: 524 - Primary Red
X2: 384 Marigold Yellow
Transparency: O
Permanence: A
Colour Index Name: PB29

178 - Cobalt Blue
X1: 089 Cadmium Orange
X2: 384 Marigold Yellow
Transparency: O
Permanence: AA
Colour Index Name: PB28

706 - Winsor Blue
X1: 524 - Primary Red
X2: 384 Marigold Yellow
Transparency: O
Permanence: A
Colour Index Name: PB15

523 - Primary Blue
X1: 524 - Primary Red
X2: 384 Marigold Yellow
Transparency: O
Permanence: A
Colour Index Name: PB15

137 - Cerulean Blue
X1: 089 Cadmium Orange
X2: 384 Marigold Yellow
Transparency: O
Permanence: AA
Colour Index Name: PB35

538 - Prussian Blue
X1: 524 - Primary Red
X2: 384 Marigold Yellow
Transparency: O
Permanence: A
Colour Index Name: PB27

322 - Indigo
X1: 089 Cadmium Orange
X2: 384 Marigold Yellow
Transparency: O
Permanence: A
Colour Index Name: PB15, PBk6, PB29

191 - Cobalt Turquoise Light
X1: 089 Cadmium Orange
X2: 384 Marigold Yellow
Transparency: O
Permanence: AA
Colour Index Name: PG50

692 - Viridian
X1: 524 - Primary Red
X2: 384 Marigold Yellow
Transparency: T
Permanence: AA
Colour Index Name: PG18

720 - Winsor Green
X1 360 Light Purple:
X2:625 Spectrum Violet
Transparency: O
Permanence: A
Colour Index Name: PG7

459 - Oxide of Chromium
X1: 004 Alizarin Crimson
X2:191 Cobalt Turquoise Light
Transparency: O
Permanence: A
Colour Index Name: PG17

554 - Raw Umber
X1 360 Light Purple:
X2:625 Spectrum Violet
Transparency: O
Permanence: AA
Colour Index Name: PY42, PBr7

744 - Yellow Ochre
X1: 004 Alizarin Crimson
X2:191 Cobalt Turquoise Light
Transparency: O
Permanence: AA
Colour Index Name: PY42

552 - Raw Sienna
X1 360 Light Purple:
X2:625 Spectrum Violet
Transparency: O
Permanence: AA
Colour Index Name: PY42, PR101, PY65

074 Burnt Sienna
X1: 004 Alizarin Crimson
X2:191 Cobalt Turquoise Light
Transparency: SO
Permanence: AA
Colour Index Name: PY42, PR101

470 - Perylene Violet
X1: 527 Primary Yellow
X2: 508 Permanent Yellow Deep
Transparency: O
Permanence: A
Colour Index Name: PV29

564 - Red Ochre
X1: 459 Oxide of Chromium
X2: 692 Viridian
Transparency: O
Permanence: A
Colour Index Name: PR101, PV19

076 Burnt Umber
X1: 004 Alizarin Crimson
X2:191 Cobalt Turquoise Light
Transparency: O
Permanence: AA
Colour Index Name: PBr7, PY42

331 Ivory Black
Transparency: O
Permanence: AA
Colour Index Name: PBk9
512 Permanent White
Transparency: O
Permanence: A
Colour Index Name: PW6