App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 582 · 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.True or false: strong colour contrast is poor button design. (a) True (b) False
2. 2.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) white on black (d) pale pink on white
3. 3.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 24 px tall
   Back button: 72 px tall
   Send button: 48 px tall (a) Help (b) Send (c) Back
5. 5.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 52 px tall
   Save button: 28 px tall
   Done button: 68 px tall
   Start button: 68 px tall (a) Save (b) Start (c) Send (d) Done
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 44 px tall
   Start button: 52 px tall
   Back button: 32 px tall
   Cancel button: 40 px tall
9. 9.True or false: space between buttons is poor button design. (a) False (b) True
10. 10.True or false: buttons almost touching is good button design. (a) False (b) True
11. 11.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.True or false: a clear word like Save is poor button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
14. 14.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) black on pale grey (d) light grey on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Back button: 40 px tall
    Done button: 64 px tall
    Cancel button: 48 px tall (a) Done (b) Next (c) Cancel (d) Back
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Done button: 64 px tall
    Cancel button: 44 px tall (a) Done (b) Next (c) Cancel
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Done button: 44 px tall
    Next button: 56 px tall
    Save button: 64 px tall
18. 18.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) white on dark green (d) light grey on white
19. 19.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.True or false: icons with no meaning is poor button design. (a) False (b) True
21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
22. 22.True or false: space between buttons is good button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
24. 24.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) red on green (d) yellow on white
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
26. 26.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Start button: 36 px tall
    Back button: 40 px tall
    Save button: 40 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Done button: 32 px tall
    Start button: 64 px tall
29. 29.True or false: buttons almost touching is poor button design. (a) False (b) True
30. 30.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) dark blue on black (d) pale pink on white
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Send button: 52 px tall
    Back button: 52 px tall
    Done button: 48 px tall (a) Back (b) Start (c) Done (d) Send
33. 33.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
34. 34.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.True or false: a tiny 20 px button is good button design. (a) False (b) True
36. 36.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Back button: 60 px tall
    Start button: 48 px tall
    Next button: 32 px tall
38. 38.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) black on yellow (d) dark blue on white
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Done button: 48 px tall
    Save button: 36 px tall (a) Send (b) Done (c) Save
40. 40.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read

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