App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 473 · 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 this good or poor button design: a big, easy tap area? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 64 px tall
   Cancel button: 40 px tall
   Send button: 32 px tall
3. 3.True or false: a tiny 20 px button is poor button design. (a) False (b) True
4. 4.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on yellow (d) light grey on white
5. 5.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.True or false: strong colour contrast is good button design. (a) True (b) False
7. 7.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 36 px tall
   Next button: 40 px tall
   Start button: 40 px tall
   Save button: 40 px tall
9. 9.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on black (d) white on black
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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Save button: 36 px tall
    Cancel button: 52 px tall
13. 13.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
14. 14.True or false: grey text on grey is good button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Done button: 48 px tall
    Save button: 32 px tall
    Send button: 40 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Send button: 64 px tall
    Done button: 68 px tall
    Help button: 40 px tall (a) Cancel (b) Done (c) Send (d) Help
18. 18.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Back button: 56 px tall
    Done button: 44 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
22. 22.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) yellow on white (d) black on yellow
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Save button: 48 px tall
    Cancel button: 28 px tall (a) Send (b) Save (c) Cancel
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Back button: 32 px tall
    Next button: 32 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
26. 26.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) dark blue on black (d) black on pale grey
27. 27.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
28. 28.Which colour pair is easy to read? (a) dark blue on black (b) white on dark green (c) yellow on white (d) light grey on white
29. 29.True or false: strong colour contrast is poor button design. (a) False (b) True
30. 30.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on dark green (d) white on black
31. 31.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
33. 33.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) pale pink on white (d) light grey on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
35. 35.True or false: icons with no meaning is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Save button: 36 px tall
    Cancel button: 48 px tall
37. 37.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Cancel button: 44 px tall
    Save button: 72 px tall
    Done button: 52 px tall (a) Back (b) Done (c) Cancel (d) Save
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Send button: 44 px tall
    Save button: 48 px tall
    Start button: 56 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Cancel button: 40 px tall
    Save button: 32 px tall
    Start button: 36 px tall

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