B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
21%
21% -- cta conversion lift for red CTA button vs green button (contrast test) (2025)
A red CTA button outperformed a green CTA button by 21% in sign-ups in a HubSpot A/B test.
- Case study is based on an A/B test conducted by HubSpot
- The effect was attributed to contrast against page design rather than red inherently being superior
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
21%
Unit
Percentage
Data Vintage
2025
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
softriver.co
Primary
Tier C
https://www.softriver.co/blog/master-color-theory-in-marketing-to-boost-sales ↗
Source Article
Master Color Theory in Marketing to Boost Sales
Color theory in marketing is so much more than just picking pretty colors. It’s about strategically using color to tap into your audience's emotions, guide their perceptions, and influence their decisions. Think of it as a powerful psychological tool that can build your brand identity, steer custome…
Original Research
softriver.co
· Original study ↗
Methodology
A/B test result cited in blog; original test source not identified
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
red CTA button vs green button (contrast test): 21% cta conversion lift. Source: softriver.co (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/red-cta-outperformed-green-21
HTML Embed
<blockquote cite="https://lighthousedata.io/data/red-cta-outperformed-green-21" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>21%</strong> -- cta conversion lift for red CTA button vs green button (contrast test)<br><small>Source: softriver.co (2025) · <a href="https://lighthousedata.io/data/red-cta-outperformed-green-21" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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