Background Color Finder
Enter one color and get tasteful background suggestions scored live for WCAG contrast, with a precise visual picker and paste-ready CSS output.
What is the Background Color Finder?
The Background Color Finder takes a single color — your logo, brand color, text color, or a UI accent — and hands you a short list of backgrounds that actually suit it. Instead of making you guess and then hand-check contrast, it builds each background from your color's own hue and then scores every option for readability, so you get answers that look intentional and stay legible. It is the tool for the moment you have one color and just need to know: what do I put behind this?
How to use it
- Type or paste your color as a HEX code like
#2D6CDF, or grab it with the color picker. - Read the suggested backgrounds — they are built from your hue and split into light and dark options, with one Recommended pick highlighted.
- Check each card's contrast badge — the live WCAG ratio with an AAA, AA, AA-Large, or Fail verdict, plus a secondary APCA Lc reading.
- Tap any background to copy its HEX. Need the opposite job? Flip the toggle to My color is the background and it suggests readable text colors instead.
The method behind it
Good backgrounds are rarely flat white or flat black. The finder reads your color's hue, saturation, and lightness, then generates designer-grade candidates: a tinted off-white (your hue at very low saturation and about 97% lightness), a tinted charcoal (the same idea near 11% lightness, where dark surfaces can carry a little more of the hue), an analogous wash a few degrees around your hue, a low-saturation complement that makes the color pop without clashing, and clean pure white and near-black for maximum contrast. Each candidate is then measured against your color with the official WCAG relative-luminance ratio, and cross-checked with APCA, the polarity-aware contrast model being developed for WCAG 3. The result is a set of backgrounds that are tasteful by construction and verified for readability.
Examples
- #2D6CDF (a brand blue) → a tinted off-white near
#F4F7FEfor light mode, or a tinted charcoal near#10131Afor dark mode — both keep the blue readable and on-brand. - #E8B500 (a saturated yellow) → light backgrounds fail (yellow on white is barely 1.1:1), so the finder steers you to a charcoal background where the yellow finally pops and passes.
- #222222 (near-black text) → almost every light background passes, so the pick becomes about taste: a warm or cool tinted off-white over harsh pure white.
Common use cases
- Designers placing a logo or brand color on a page and wanting a background that feels deliberate, not default.
- Front-end developers picking a section or card background that keeps colored text accessible.
- Brand and marketing teams choosing slide, banner, or social backgrounds that match a single brand color.
- Anyone building a light and a dark theme from the same accent and needing both backgrounds at once.
- People who just have a color they like and want a clean, readable background to pair with it.
Why use this one
A contrast checker judges a pair you already chose; a palette generator gives you schemes, not backgrounds verified for readability. This tool does the part in between — it suggests the backgrounds for you, leans on the tinted neutrals professionals actually use, and proves each one with live WCAG and APCA scoring. It runs entirely in your browser, needs no sign-up, works instantly on mobile, and can name every color it shows. When you have both colors and want to double-check the pairing, use the Contrast Checker; to explore full schemes from your base color, try the Color Palette Generator; and to learn what a shade is called, open the Color Namer.
Frequently asked questions
How does the Background Color Finder choose backgrounds?
It reads your color's hue, saturation, and lightness, then builds a curated set of backgrounds the way a designer would: tinted off-whites and tinted charcoals (the same hue at low saturation and very high or very low lightness), a soft complementary tint to make the color pop, and clean pure white and near-black for maximum contrast. Every candidate is then scored live against your color with the official WCAG contrast formula, so each suggestion is both tasteful and readable rather than a random swatch.
Why not just put my color on white or black?
Pure white and pure black always work for contrast, and the tool always offers them. But professional interfaces rarely use flat #ffffff or #000000 as a background — a barely-tinted off-white or a charcoal that carries a hint of your hue feels more intentional and less harsh, while still passing contrast. Off-white near 97% lightness and near-black around 8-11% are also measurably easier on the eyes than pure white glare or pure black smear. The finder gives you those designer-grade tinted neutrals alongside the safe pure options.
What do the AA and AA-Large badges mean?
They report whether your color, used as text on that background, meets WCAG accessibility contrast. Normal body text needs a ratio of at least 4.5:1 to pass AA; large text (about 24px, or 18.66px bold) only needs 3:1. A green AA badge means it is safe for body text, AAA means it clears the stricter 7:1 bar, AA-Large means it works for headings or big labels but not small text, and Fail means the pairing is too low-contrast to be reliably readable.
What is the APCA Lc number?
APCA is the newer contrast model being developed for WCAG 3. It returns a lightness-contrast value, Lc, from about 0 to 108, and unlike the WCAG 2 ratio it is polarity-aware — it knows that light-on-dark reads differently from dark-on-light. As a rough guide, Lc 90 is ideal for small body text, 75 is a sensible floor for readable text, 60 suits large headings, and below 30 is decorative only. We gate the badges on the established WCAG 2 ratio and show APCA Lc as a useful second opinion.
Can I find a text color for a background instead?
Yes. Flip the toggle from 'My color is the element' to 'My color is the background' and the tool inverts the problem: it keeps your color as the background and suggests readable text and ink colors — tinted darks, tinted lights, pure black or white, and an accent — each scored with the same live WCAG contrast so you know which stays legible.
Is my color uploaded anywhere?
No. Parsing, the HSL math, the contrast scoring, and every preview all run entirely in your browser. Nothing is sent to a server, there is no sign-up, and you can share a specific color by adding ?color=2D6CDF to the URL.