App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 569 · 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) yellow on white (b) dark blue on black (c) black on pale grey (d) pale pink on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 68 px tall
   Start button: 72 px tall
   Done button: 24 px tall (a) Help (b) Done (c) Start
4. 4.True or false: buttons almost touching is good button design. (a) True (b) False
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
6. 6.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) yellow on white (d) black on yellow
7. 7.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
8. 8.True or false: a tiny 20 px button is good button design. (a) True (b) False
9. 9.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) dark blue on black (d) dark blue on white
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Send button: 48 px tall
    Back button: 56 px tall (a) Next (b) Send (c) Back
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Help button: 52 px tall
    Start button: 72 px tall (a) Help (b) Start (c) Send
13. 13.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) light grey on white (d) black on pale grey
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Start button: 68 px tall
    Help button: 52 px tall
    Back button: 40 px tall (a) Start (b) Send (c) Help (d) Back
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Send button: 44 px tall
    Start button: 68 px tall (a) Cancel (b) Start (c) Send
16. 16.True or false: grey text on grey is good button design. (a) False (b) True
17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Save button: 36 px tall
    Help button: 60 px tall
    Send button: 32 px tall
19. 19.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on white (d) pale pink on white
20. 20.🌗 Is white on dark green 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. How many of these buttons follow the rule?
    Done button: 44 px tall
    Start button: 36 px tall
    Back button: 32 px tall
22. 22.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
24. 24.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Cancel button: 56 px tall
    Send button: 52 px tall
    Back button: 36 px tall
26. 26.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
30. 30.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Start button: 40 px tall
    Save button: 64 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 48 px tall
    Next button: 28 px tall (a) Back (b) Send (c) Next
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Back button: 72 px tall
    Cancel button: 44 px tall (a) Cancel (b) Back (c) Done
34. 34.True or false: icons with no meaning is good button design. (a) True (b) False
35. 35.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
36. 36.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) red on green (d) yellow on white
37. 37.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Help button: 60 px tall
    Save button: 44 px tall
    Back button: 48 px tall (a) Back (b) Help (c) Save (d) Cancel
39. 39.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) black on yellow (d) pale pink on white
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Start button: 40 px tall
    Back button: 68 px tall (a) Send (b) Start (c) Back

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