App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 20 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 44 px tall
   Help button: 36 px tall
   Cancel button: 40 px tall
   Save button: 52 px tall
2. 2.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) yellow on white (d) white on dark green
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 48 px tall
   Done button: 40 px tall
   Back button: 56 px tall
   Cancel button: 52 px tall (a) Back (b) Done (c) Send (d) Cancel
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 40 px tall
   Help button: 32 px tall
   Save button: 36 px tall
5. 5.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 36 px tall
   Done button: 48 px tall
   Back button: 60 px tall (a) Back (b) Done (c) Send
9. 9.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on yellow (d) red on green
10. 10.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on black (d) red on green
11. 11.True or false: buttons almost touching is poor button design. (a) False (b) True
12. 12.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) dark blue on black (d) white on dark green
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
15. 15.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
16. 16.True or false: buttons almost touching is good button design. (a) False (b) True
17. 17.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Start button: 48 px tall
    Help button: 44 px tall
19. 19.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) light grey on white (d) white on black
22. 22.True or false: a big, easy tap area is good button design. (a) False (b) True
23. 23.True or false: strong colour contrast is poor button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Cancel button: 56 px tall
    Done button: 52 px tall
    Save button: 36 px tall (a) Cancel (b) Done (c) Start (d) Save
25. 25.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) white on dark green (d) black on yellow
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Save button: 60 px tall
    Cancel button: 56 px tall
    Start button: 48 px tall (a) Save (b) Cancel (c) Start (d) Back
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Start button: 56 px tall
    Cancel button: 68 px tall
    Send button: 40 px tall (a) Next (b) Cancel (c) Start (d) Send
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Done button: 32 px tall
    Start button: 64 px tall
    Save button: 36 px tall
29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
31. 31.True or false: a tiny 20 px button is good button design. (a) False (b) True
32. 32.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) black on pale grey (d) red on green
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 40 px tall
    Help button: 36 px tall
    Start button: 48 px tall
34. 34.True or false: grey text on grey is poor button design. (a) False (b) True
35. 35.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) light grey on white (d) dark blue on white
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
37. 37.True or false: a clear word like Save is good button design. (a) True (b) False
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Next button: 40 px tall
    Start button: 32 px tall
    Save button: 64 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Done button: 56 px tall
    Next button: 40 px tall (a) Done (b) Next (c) Cancel
40. 40.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) black on yellow (d) pale pink on white

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