App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 397 · 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 dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
4. 4.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
6. 6.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
7. 7.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on black (d) dark blue on white
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 52 px tall
   Done button: 44 px tall
   Next button: 60 px tall (a) Done (b) Next (c) Back
9. 9.True or false: grey text on grey is poor button design. (a) False (b) True
10. 10.True or false: icons with no meaning is poor button design. (a) True (b) False
11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on dark green (d) dark blue on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
14. 14.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Start button: 68 px tall
    Next button: 48 px tall
    Save button: 72 px tall (a) Save (b) Start (c) Send (d) Next
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Help button: 60 px tall
    Back button: 60 px tall
    Next button: 68 px tall (a) Next (b) Help (c) Save (d) Back
17. 17.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on white (d) dark blue on black
19. 19.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
20. 20.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Cancel button: 48 px tall
    Save button: 64 px tall
    Next button: 52 px tall (a) Cancel (b) Next (c) Save (d) Help
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Next button: 44 px tall
    Help button: 72 px tall
    Back button: 48 px tall (a) Cancel (b) Help (c) Back (d) Next
24. 24.True or false: a big, easy tap area is good button design. (a) True (b) False
25. 25.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) pale pink on white (d) black on pale grey
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 68 px tall
    Done button: 32 px tall
    Send button: 60 px tall (a) Send (b) Done (c) Next (d) Save
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Next button: 36 px tall
    Save button: 48 px tall (a) Done (b) Save (c) Next
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Back button: 36 px tall
    Start button: 52 px tall
29. 29.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 40 px tall
    Done button: 40 px tall
    Cancel button: 32 px tall
31. 31.True or false: space between buttons is good button design. (a) True (b) False
32. 32.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) white on dark green (d) black on pale grey
33. 33.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) white on dark green
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Save button: 48 px tall
    Done button: 32 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Send button: 60 px tall
    Cancel button: 24 px tall
    Save button: 56 px tall (a) Help (b) Cancel (c) Send (d) Save
36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
37. 37.True or false: a big, easy tap area is poor button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Start button: 64 px tall
    Back button: 48 px tall (a) Start (b) Back (c) Send
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Next button: 48 px tall
    Help button: 68 px tall
    Save button: 24 px tall (a) Help (b) Next (c) Back (d) Save

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