App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 245 · 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.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) black on yellow (d) red on green
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 36 px tall
   Help button: 64 px tall
   Start button: 52 px tall (a) Send (b) Start (c) Help
3. 3.True or false: a tiny 20 px button is good button design. (a) False (b) True
4. 4.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) dark blue on white (d) red on green
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 52 px tall
   Done button: 48 px tall
   Back button: 56 px tall
6. 6.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) black on pale grey (d) dark blue on white
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Save button: 48 px tall
   Send button: 24 px tall
   Cancel button: 48 px tall (a) Next (b) Save (c) Send (d) Cancel
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 24 px tall
   Save button: 56 px tall
   Next button: 60 px tall (a) Next (b) Save (c) Back
10. 10.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Start button: 52 px tall
    Save button: 44 px tall
    Cancel button: 52 px tall (a) Save (b) Start (c) Done (d) Cancel
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
16. 16.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
18. 18.True or false: a clear word like Save is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Done button: 28 px tall
    Start button: 56 px tall (a) Send (b) Start (c) Done
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Start button: 56 px tall
    Done button: 28 px tall
    Next button: 56 px tall (a) Start (b) Next (c) Back (d) Done
21. 21.True or false: buttons almost touching is poor button design. (a) True (b) False
22. 22.True or false: space between buttons is poor button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Next button: 48 px tall
    Save button: 24 px tall (a) Start (b) Save (c) Next
24. 24.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 32 px tall
    Cancel button: 56 px tall
    Back button: 48 px tall (a) Start (b) Save (c) Cancel (d) Back
26. 26.True or false: grey text on grey is good button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Next button: 56 px tall
    Cancel button: 72 px tall
    Back button: 48 px tall (a) Cancel (b) Back (c) Save (d) Next
28. 28.True or false: grey text on grey is poor button design. (a) False (b) True
29. 29.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) light grey on white (d) white on black
30. 30.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Start button: 68 px tall
    Done button: 56 px tall
    Back button: 60 px tall (a) Start (b) Cancel (c) Back (d) Done
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
33. 33.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) dark blue on black (d) black on yellow
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Help button: 68 px tall
    Start button: 28 px tall (a) Next (b) Help (c) Start
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 60 px tall
    Next button: 32 px tall
    Save button: 36 px tall
36. 36.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) red on green (d) light grey on white
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Start button: 64 px tall
    Save button: 52 px tall
40. 40.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read

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