App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 610 · 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.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.True or false: buttons almost touching is poor button design. (a) False (b) True
3. 3.True or false: strong colour contrast is poor button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 68 px tall
   Help button: 32 px tall
   Send button: 52 px tall
   Cancel button: 48 px tall (a) Next (b) Send (c) Cancel (d) Help
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 68 px tall
   Next button: 64 px tall
   Send button: 48 px tall
   Cancel button: 28 px tall (a) Help (b) Next (c) Send (d) Cancel
8. 8.True or false: a clear word like Save is good button design. (a) False (b) True
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
10. 10.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) pale pink on white (d) yellow on white
11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
12. 12.Which colour pair is easy to read? (a) black on pale grey (b) pale pink on white (c) light grey on white (d) dark blue on black
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Cancel button: 60 px tall
    Start button: 56 px tall
    Save button: 60 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Save button: 68 px tall
    Send button: 60 px tall (a) Back (b) Send (c) Save
15. 15.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
17. 17.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) red on green (d) black on pale grey
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
19. 19.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
20. 20.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) black on pale grey (d) light grey on white
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Cancel button: 52 px tall
    Help button: 56 px tall
22. 22.True or false: strong colour contrast is good button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Start button: 64 px tall
    Done button: 64 px tall
    Help button: 24 px tall (a) Next (b) Done (c) Help (d) Start
24. 24.True or false: icons with no meaning is good button design. (a) True (b) False
25. 25.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) yellow on white (d) red on green
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Save button: 72 px tall
    Start button: 24 px tall (a) Help (b) Save (c) Start
27. 27.Which colour pair is easy to read? (a) red on green (b) white on black (c) yellow on white (d) pale pink on white
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Save button: 48 px tall
    Start button: 44 px tall (a) Back (b) Save (c) Start
29. 29.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) light grey on white (d) pale pink on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Next button: 60 px tall
    Save button: 56 px tall
    Back button: 44 px tall
31. 31.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) dark blue on white (d) white on dark green
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
34. 34.Which colour pair is hard to read? (a) white on black (b) pale pink on white (c) white on dark green (d) dark blue on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Help button: 52 px tall
    Start button: 60 px tall (a) Help (b) Cancel (c) Start
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Cancel button: 40 px tall
    Send button: 36 px tall
    Next button: 32 px tall
39. 39.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
40. 40.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read

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