Color Brightness in Google Sheets
Formula
Color Brightness Calculator provides comprehensive brightness analysis including relative luminance, perceived brightness, YIQ calculations, and WCAG AA/AAA contrast compliance with recommended text colors.
=VERVE("colorbrightness", A2)=VERVE.CALL("colorbrightness", A2)A2 holds the hex you're looking up. Drag the formula down and each row resolves on its own.
With literal values
Nothing has to come from a cell — typed values work the same way.
=VERVE("colorbrightness", "FF5733")Inputs
Required inputs are positional, in the order below. Everything else is passed as a "name", value pair after them — the same shape as SUMIFS.
| Input | Type | Where it goes | Description |
|---|---|---|---|
hexRequired | string | argument 2 | Hex color value (with or without # prefix) (e.g. FF5733) |
What lands in your sheet
With no "field" pair the formula spills the whole response as two columns — field name on the left, value on the right — starting at the cell you typed in. Make sure the cells below and to the right are empty.
Pulling one value
Add a "field" pair to get a single cell back instead of a table. The field name is the dot-path from the table below.
=VERVE("colorbrightness", A2, "field", "hex")=VERVE.CALL("colorbrightness", A2, "field", "hex")Available fields
#PREMIUM(field) rather than a value, so a locked field never looks like a real answer.| Use as "field" | Type | Example cell value | Description |
|---|---|---|---|
hex | string | #FF5733 | Hexadecimal color value provided in the request |
rgb | object | {…} | RGB color components: red, green, blue values |
rgb.r | number | 255 | Red component value between 0 and 255 |
rgb.g | number | 87 | Green component value between 0 and 255 |
rgb.b | number | 51 | Blue component value between 0 and 255 |
luminancePremium | number | 0.2832 | Relative luminance calculated using WCAG 2.0 formula |
perceived_brightnessPremium | number | 131 | Perceived brightness score from 0 to 255 |
yiqPremium | number | 133.13 | YIQ color space brightness value for brightness analysis |
is_light | boolean | false | Boolean indicating if color is considered light |
is_dark | boolean | true | Boolean indicating if color is considered dark |
brightness_category | string | dark | Brightness classification: light, medium, or dark category |
recommended_text_colorPremium | string | #FFFFFF | Recommended text color for optimal contrast and readability |
contrast_ratio_with_whitePremium | number | 3.15 | WCAG contrast ratio calculation between color and white |
contrast_ratio_with_blackPremium | number | 6.66 | WCAG contrast ratio calculation between color and black |
wcag_aa_compliant_with_whitePremium | boolean | false | Whether color meets WCAG AA contrast requirements with white |
wcag_aa_compliant_with_blackPremium | boolean | true | Whether color meets WCAG AA contrast requirements with black |
wcag_aaa_compliant_with_whitePremium | boolean | false | Whether color meets WCAG AAA contrast requirements with white |
wcag_aaa_compliant_with_blackPremium | boolean | false | Whether color meets WCAG AAA contrast requirements with black |
Filling a whole column
Hand the first argument a range instead of a cell and the add-in makes one batched call for the lot, then spills the answers down. That is faster than dragging the formula and costs the same credits — one per row looked up.
=VERVE("colorbrightness", A2:A100, "field", "hex")=VERVE.CALL("colorbrightness", A2:A100, "field", "hex")A2:A100 is the column of hex values. The result spills down alongside it, one row per input, blanks skipped.
When a cell doesn't fill
A failed lookup returns readable text starting with #ERR rather than a spreadsheet error, because Excel cannot show a custom message on a real error — you would get a bare #VALUE! with no reason. The trade-off is that IFERROR() won't catch it; test with LEFT(cell, 4) = "#ERR" instead.
| Cell reads | What happened |
|---|---|
#ERR Not connected | No API key saved. Open the side panel and connect your account. |
#ERR Replace <name> with a cell or value | The preview formula was copied as-is. Swap the placeholder for a cell reference. |
#ERR No "x" in colorbrightness | An option name that this source doesn't take. The message lists the ones it does. |
#ERR No data point "…" | The "field" path isn't in the response. Check the dot-path against the table above. |
#PREMIUM(field) | The field exists but your plan doesn't include it. |
#ERR Out of credits | The month's credits are spent. Usage resets on your billing date. |
Before the formula works
The add-in reads the API key you saved once in the side panel — the key never goes in the formula, so a shared sheet doesn't leak it and a collaborator without access simply sees the last calculated values.
- Install the add-in for Google Sheets or Excel.
- Open the side panel and sign in, or paste a key from your dashboard.
- Type the formula above into any cell.
Other ways to use Color Brightness in Google Sheets
Set up Color Brightness in Google Sheets on VerveSheets, or reach the same source a different way. Your VerveSheets account and credits work on all of them — one key, one balance.
Frequently asked questions
Does Color Brightness in Google Sheets work in both Google Sheets and Excel?
Yes — the same source, the same arguments. Sheets calls it =VERVE("colorbrightness", …) and Excel calls it =VERVE.CALL("colorbrightness", …); that function name is the only difference.
Do the cells recalculate on their own?
They recalculate when the sheet does — on edit, on open, or on a manual recalc. Each recalculation is a fresh call and spends credits, so for a large static column it's worth copying the results and pasting them as values.
How many credits does a filled column cost?
1 credit per row looked up, whether you drag the formula or pass a range. The range form is one HTTP call instead of many, but the credit count is the same.
Can I share the sheet without sharing my key?
Yes. The key is stored against your account, not in the file. Collaborators see the values already in the cells; formulas only recalculate for someone who has connected their own account.
Why is a cell showing #ERR instead of an error?
So you can read the reason. Excel can't display a custom message on a real spreadsheet error, so the add-in returns the explanation as text on both platforms instead.