App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 427 · 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 this good or poor button design: space between buttons? (a) poor design (b) good design
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
3. 3.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) light grey on white (d) white on dark green
4. 4.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 32 px tall
   Save button: 56 px tall
   Help button: 64 px tall
   Send button: 40 px tall
8. 8.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on pale grey (d) yellow on white
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 64 px tall
   Done button: 36 px tall
   Next button: 72 px tall
   Send button: 60 px tall (a) Send (b) Next (c) Help (d) Done
10. 10.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) red on green (d) black on yellow
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
13. 13.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) light grey on white (d) dark blue on black
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Next button: 64 px tall
    Save button: 36 px tall (a) Next (b) Save (c) Done
15. 15.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Help button: 48 px tall
    Done button: 68 px tall (a) Help (b) Cancel (c) Done
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Start button: 56 px tall
    Next button: 72 px tall
    Save button: 64 px tall (a) Start (b) Next (c) Save (d) Help
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 64 px tall
    Next button: 64 px tall
    Help button: 52 px tall
19. 19.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Back button: 52 px tall
    Start button: 56 px tall
    Help button: 52 px tall
21. 21.True or false: a clear word like Save is poor button design. (a) False (b) True
22. 22.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) white on dark green (d) black on pale grey
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 64 px tall
    Send button: 40 px tall (a) Done (b) Next (c) Send
25. 25.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.True or false: space between buttons is poor button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Back button: 40 px tall
    Done button: 48 px tall
    Send button: 60 px tall
28. 28.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
30. 30.True or false: icons with no meaning is poor button design. (a) True (b) False
31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 32 px tall
    Send button: 48 px tall
    Start button: 60 px tall
33. 33.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) black on yellow (d) red on green
34. 34.True or false: strong colour contrast is poor button design. (a) False (b) True
35. 35.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.True or false: icons with no meaning is good button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
38. 38.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on dark green (d) black on pale grey
39. 39.True or false: a clear word like Save is good button design. (a) True (b) False
40. 40.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read

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