App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 399 · 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) dark blue on black (b) yellow on white (c) light grey on white (d) white on black
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 28 px tall
   Back button: 68 px tall
   Help button: 60 px tall (a) Next (b) Back (c) Help
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 52 px tall
   Next button: 52 px tall
   Help button: 56 px tall
   Cancel button: 28 px tall (a) Next (b) Done (c) Cancel (d) Help
4. 4.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) black on yellow (d) white on dark green
6. 6.True or false: grey text on grey is poor button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 56 px tall
   Back button: 24 px tall
   Cancel button: 52 px tall (a) Cancel (b) Help (c) Back
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 32 px tall
   Back button: 52 px tall
   Send button: 64 px tall
9. 9.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Save button: 48 px tall
    Next button: 56 px tall (a) Next (b) Save (c) Start
11. 11.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
16. 16.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) dark blue on black (d) pale pink on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Cancel button: 60 px tall
    Send button: 56 px tall
    Save button: 48 px tall
19. 19.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
20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
22. 22.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) red on green (d) yellow on white
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
24. 24.True or false: space between buttons is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Start button: 56 px tall
    Send button: 56 px tall
26. 26.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
27. 27.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) yellow on white (d) pale pink on white
28. 28.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) dark blue on white (d) red on green
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Done button: 48 px tall
    Send button: 60 px tall (a) Send (b) Done (c) Next
31. 31.True or false: icons with no meaning is good button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Back button: 56 px tall
    Send button: 44 px tall
    Help button: 60 px tall (a) Help (b) Back (c) Send (d) Cancel
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Help button: 44 px tall
    Save button: 36 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 64 px tall
    Help button: 24 px tall (a) Save (b) Next (c) Help
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Send button: 68 px tall
    Back button: 52 px tall
    Cancel button: 48 px tall (a) Back (b) Done (c) Cancel (d) Send
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Start button: 44 px tall
    Send button: 36 px tall
    Save button: 36 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?

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