App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 640 · 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.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
2. 2.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) dark blue on black (d) light grey on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 40 px tall
   Done button: 48 px tall
   Save button: 52 px tall (a) Save (b) Cancel (c) Done
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 52 px tall
   Save button: 44 px tall
   Back button: 36 px tall
5. 5.True or false: a tiny 20 px button is good button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 64 px tall
   Next button: 56 px tall
   Save button: 36 px tall
7. 7.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 68 px tall
   Back button: 72 px tall
   Help button: 28 px tall (a) Back (b) Help (c) Next
9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Save button: 52 px tall
    Start button: 44 px tall
12. 12.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on yellow (d) dark blue on black
13. 13.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Help button: 48 px tall
    Start button: 52 px tall
    Next button: 56 px tall (a) Back (b) Start (c) Next (d) Help
15. 15.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Done button: 56 px tall
    Back button: 60 px tall
17. 17.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) pale pink on white (d) white on black
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Start button: 36 px tall
    Help button: 40 px tall
    Send button: 36 px tall
19. 19.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) white on dark green (d) white on black
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
22. 22.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Send button: 56 px tall
    Cancel button: 48 px tall
    Done button: 64 px tall (a) Done (b) Cancel (c) Start (d) Send
25. 25.True or false: icons with no meaning is poor button design. (a) False (b) True
26. 26.True or false: a tiny 20 px button is poor button design. (a) True (b) False
27. 27.True or false: icons with no meaning is good button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Done button: 44 px tall
    Save button: 68 px tall (a) Cancel (b) Done (c) Save
30. 30.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
32. 32.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
33. 33.True or false: space between buttons is good button design. (a) False (b) True
34. 34.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Send button: 36 px tall
    Cancel button: 52 px tall
    Done button: 60 px tall (a) Cancel (b) Back (c) Done (d) Send
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Help button: 44 px tall
    Cancel button: 60 px tall
37. 37.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) yellow on white (d) light grey on white
38. 38.True or false: strong colour contrast is poor button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Next button: 56 px tall
    Back button: 48 px tall (a) Next (b) Start (c) Back
40. 40.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) white on black (d) black on yellow

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