App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 669 · 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. How many of these buttons follow the rule?
   Cancel button: 40 px tall
   Next button: 52 px tall
   Save button: 64 px tall
2. 2.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) yellow on white (d) black on yellow
3. 3.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) dark blue on white
4. 4.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 28 px tall
   Back button: 72 px tall
   Next button: 60 px tall (a) Back (b) Cancel (c) Next
6. 6.True or false: strong colour contrast is good button design. (a) False (b) True
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 52 px tall
   Send button: 48 px tall
   Back button: 56 px tall
   Save button: 48 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Save button: 64 px tall
    Cancel button: 60 px tall
    Done button: 56 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Send button: 64 px tall
    Help button: 60 px tall (a) Send (b) Help (c) Back
12. 12.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Help button: 68 px tall
    Start button: 48 px tall (a) Next (b) Start (c) Help
15. 15.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
16. 16.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Next button: 36 px tall
    Save button: 60 px tall
18. 18.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Send button: 32 px tall
    Done button: 48 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Help button: 32 px tall
    Cancel button: 64 px tall (a) Help (b) Cancel (c) Done
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Cancel button: 36 px tall
    Send button: 48 px tall (a) Send (b) Back (c) Cancel
24. 24.🔘 Is this good or poor button design: icons with no meaning? (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: 44 px tall
    Send button: 40 px tall
    Back button: 48 px tall
    Help button: 60 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Cancel button: 52 px tall
    Send button: 32 px tall
28. 28.True or false: a big, easy tap area is poor button design. (a) True (b) False
29. 29.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) black on yellow (d) white on dark green
30. 30.True or false: a tiny 20 px button is poor button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Done button: 36 px tall
    Next button: 64 px tall
32. 32.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) light grey on white (d) dark blue on white
33. 33.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Cancel button: 44 px tall
    Next button: 60 px tall
    Help button: 48 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.True or false: grey text on grey is poor button design. (a) True (b) False
39. 39.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) pale pink on white (d) yellow on white
40. 40.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) red on green (d) light grey on white

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