App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 220 · 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) black on yellow (c) light grey on white (d) dark blue on black
2. 2.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) red on green (d) light grey on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
4. 4.True or false: icons with no meaning is poor button design. (a) True (b) False
5. 5.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on pale grey (d) yellow on white
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Help button: 40 px tall
   Next button: 60 px tall (a) Next (b) Cancel (c) Help
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 28 px tall
   Help button: 52 px tall
   Cancel button: 72 px tall (a) Cancel (b) Help (c) Save
8. 8.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
10. 10.🌗 Is pale pink on white 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. The Next button is 32 px tall. How many px taller must it be?
12. 12.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) black on yellow (d) white on dark green
13. 13.🔘 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 (a) Send (b) Start (c) Cancel
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Send button: 36 px tall
    Back button: 60 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Send button: 52 px tall
    Start button: 40 px tall (a) Save (b) Start (c) Send
16. 16.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Done button: 60 px tall
    Help button: 64 px tall
    Back button: 52 px tall (a) Back (b) Done (c) Cancel (d) Help
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 60 px tall
    Save button: 68 px tall
    Start button: 24 px tall (a) Start (b) Save (c) Done (d) Next
22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Send button: 36 px tall
    Next button: 64 px tall
24. 24.True or false: a clear word like Save is poor button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Back button: 60 px tall
    Next button: 56 px tall
    Start button: 64 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Cancel button: 52 px tall
    Next button: 72 px tall (a) Cancel (b) Next (c) Start
27. 27.True or false: strong colour contrast is good button design. (a) False (b) True
28. 28.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 44 px tall
    Back button: 52 px tall
30. 30.True or false: a clear word like Save is good button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
33. 33.True or false: strong colour contrast is poor button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Send button: 56 px tall
    Next button: 40 px tall
    Done button: 52 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
36. 36.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
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: a big, easy tap area is good button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Cancel button: 52 px tall
    Back button: 36 px tall (a) Cancel (b) Send (c) Back
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Help button: 32 px tall
    Send button: 68 px tall (a) Help (b) Send (c) Next

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