App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 270 · 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) pale pink on white (b) yellow on white (c) light grey on white (d) white on black
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 36 px tall
   Save button: 36 px tall
   Help button: 64 px tall
3. 3.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on dark green (d) red on green
5. 5.True or false: a clear word like Save is poor button design. (a) False (b) True
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 44 px tall
   Done button: 52 px tall
   Save button: 64 px tall
7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
8. 8.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.True or false: a tiny 20 px button is poor button design. (a) True (b) False
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Next button: 36 px tall
    Help button: 36 px tall
    Back button: 64 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 28 px tall
    Done button: 52 px tall (a) Save (b) Next (c) Done
13. 13.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) red on green (d) black on yellow
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Send button: 48 px tall
    Start button: 40 px tall
    Cancel button: 36 px tall
17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Save button: 56 px tall
    Done button: 44 px tall (a) Back (b) Done (c) Save
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Send button: 60 px tall
    Next button: 68 px tall (a) Send (b) Start (c) Next
20. 20.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) white on black (d) white on dark green
21. 21.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Back button: 60 px tall
    Help button: 36 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Start button: 60 px tall
    Send button: 36 px tall
    Cancel button: 48 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Send button: 48 px tall
    Next button: 56 px tall
25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on pale grey (d) red on green
28. 28.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Cancel button: 48 px tall
    Done button: 28 px tall (a) Cancel (b) Done (c) Back
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
31. 31.True or false: icons with no meaning is poor button design. (a) True (b) False
32. 32.True or false: buttons almost touching is poor button design. (a) True (b) False
33. 33.True or false: a big, easy tap area is good button design. (a) False (b) True
34. 34.True or false: strong colour contrast is poor button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Back button: 52 px tall
    Next button: 32 px tall (a) Next (b) Back (c) Help
36. 36.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
38. 38.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) light grey on white (d) white on dark green
40. 40.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) black on yellow (d) white on black

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