App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 599 · 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.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) red on green (d) white on black
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 60 px tall
   Cancel button: 52 px tall
   Save button: 52 px tall
   Back button: 24 px tall (a) Cancel (b) Done (c) Save (d) Back
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 60 px tall
   Start button: 64 px tall
   Send button: 64 px tall
   Cancel button: 60 px tall
6. 6.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
9. 9.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
11. 11.True or false: a big, easy tap area is good button design. (a) False (b) True
12. 12.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Back button: 32 px tall
    Next button: 32 px tall
14. 14.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.Which colour pair is easy to read? (a) dark blue on white (b) pale pink on white (c) light grey on white (d) dark blue on black
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Cancel button: 60 px tall
    Start button: 24 px tall (a) Start (b) Cancel (c) Save
17. 17.True or false: buttons almost touching is good button design. (a) False (b) True
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Save button: 44 px tall
    Cancel button: 68 px tall
    Next button: 48 px tall (a) Save (b) Next (c) Help (d) Cancel
19. 19.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on black (d) white on dark green
20. 20.True or false: strong colour contrast is good button design. (a) True (b) False
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Send button: 24 px tall
    Cancel button: 72 px tall (a) Cancel (b) Done (c) Send
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Start button: 32 px tall
    Save button: 64 px tall
    Send button: 56 px tall
23. 23.True or false: a big, easy tap area is poor button design. (a) True (b) False
24. 24.True or false: space between buttons is good 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?
    Next button: 36 px tall
    Start button: 64 px tall
    Cancel button: 40 px tall
    Back button: 64 px tall
26. 26.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Cancel button: 68 px tall
    Save button: 56 px tall
    Send button: 40 px tall (a) Start (b) Send (c) Save (d) Cancel
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Send button: 36 px tall
    Next button: 56 px tall
    Save button: 64 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Cancel button: 72 px tall
    Send button: 40 px tall (a) Cancel (b) Start (c) Send
30. 30.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Next button: 36 px tall
    Save button: 52 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Save button: 72 px tall
    Cancel button: 28 px tall
    Start button: 48 px tall (a) Start (b) Cancel (c) Help (d) Save
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Start button: 40 px tall
    Save button: 60 px tall (a) Start (b) Cancel (c) Save
35. 35.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) yellow on white (d) red on green
36. 36.True or false: strong colour contrast is poor button design. (a) False (b) True
37. 37.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
38. 38.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) dark blue on white (d) black on pale grey
39. 39.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.True or false: grey text on grey is good button design. (a) False (b) True

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