NEUTRALS
Phantom Hue
#645D5E
Phantom Hue is #645D5E in HEX — rgb(100, 93, 94), hsl(351°, 4%, 38%), cmyk(0%, 7%, 6%, 61%).
Phantom Hue pulls into the rich end of the neutrals spectrum — HSL 351°, 4%, 38%. The neutral saturation makes it near-neutral and forgiving, and the hue reads cool. In interior projects it shines on main walls, trims, ceilings — versatile across nearly any style. Reads best alongside soft whites, natural wood, matte black trim, linen.
Color Codes
Paint Matches — this color across 16 brands
Light Reflectance & Undertone
Light Reflectance Value (LRV)
11/100
Dark
Soaks up light and feels moody and intimate. Great for studies, dining rooms and accent walls; pair with ample lighting.
Undertone
A near-neutral with a subtle neutral pink undertone — it will pick up colour from surrounding surfaces and shift noticeably under different light.
Color Theory
Complementary
Analogous
Triadic
Split-Complementary
Tetradic
Monochromatic
Rectangle
Compound
Shades & Tints
Shades and tints of Phantom Hue run from a pale tint down to a deep shade — same hue and saturation, lightness stepped. Each rung below shows its exact HEX code; tap any to copy it.
Variations
Lighter
Darker
Saturation
Interior Use
Best Rooms
living rooms, bedrooms, kitchens
Best Uses
main walls, trim, accents
Pairs With
soft whites, natural wood, brass, matte black trim
Accessibility (WCAG)
Deuteranopia
Protanopia
Tritanopia
Color Psychology
Quiet · Versatile
Phantom Hue gets out of the way so the architecture and the people in the room do the work. The right neutral is never a default — it reads warm or cool, dusty or sharp depending on its undertone, and that undertone is what makes or breaks the room.
How it looks under different light
Pairs With
Paint Info
Brand · Product Line
Benjamin Moore / Regal Select Interior
Recommended Finishes
Eggshell (walls) · Pearl (trim) · Matte (ceiling)
Eggshell hides imperfections on main walls while keeping the color rich; pearl on trim adds subtle sheen and easier cleaning; flat matte on ceilings prevents glare.
Best Surfaces
Primary walls · Cabinetry · Doors · Mouldings
Coverage & Dry Time
Typical coverage 350-400 sq ft per gallon over a primed surface.
Touch-dry in ~1 hour. Recoat after 4 hours. Full cure 7-14 days.
Primer
Standard primer is adequate.
Application Tip
Use a 9" microfiber roller on walls and a 2.5" angled sash brush for trim cuts. Two coats minimum for even depth.
Paint Calculator
You'll need
4.0 litres
1.06 US gallons · room for one touch-up coat. Buy slightly more to ensure single-batch match.
Code Snippets
color: #645D5E;background-color: #645D5E;--color-phantom-hue: #645D5E;colors: { 'phantom-hue': '#645D5E' }bg-[#645D5E] text-[#645D5E]$phantom-hue: #645D5E;Similar Colors
Our color tools run on our own catalogue of 26,000+ real paint colors across 16 brands — Benjamin Moore, Sherwin-Williams, Behr, Dulux, RAL and more — with the color math (HSL and CIELAB matching) computed in-house, not scraped from summaries. Every color you pick maps to a real, buyable paint with its code, so what you see here you can actually take to the store. We review and update these tools and their data regularly.
Created by Denis Kataev, founder of DSGN.HOUSE — a software engineer and digital entrepreneur building professional color-design tools for everyone.
Frequently Asked Questions
What color is #645D5E?
#645D5E is Phantom Hue, a deep neutral with a cool undertone.
Is #645D5E warm or cool?
Phantom Hue reads cool, which influences how it interacts with surrounding tones and natural light.
What rooms work best with Phantom Hue?
Phantom Hue works well in living rooms, bedrooms, kitchens. Designers typically use it for main walls, trim, accents.
What colors pair well with Phantom Hue?
Phantom Hue pairs naturally with soft whites, natural wood, brass, matte black trim. Its complementary color is also a strong contrast option for accents.
Where can I download Phantom Hue?
You can download Phantom Hue on DSGN.HOUSE in 15 designer formats including CSS gradient, Figma, Procreate swatches, Tailwind config, Adobe ASE, SVG, and 4K wallpapers — all free.
What's the hex code for Phantom Hue?
The hex code is #645D5E. In RGB it's 100, 93, 94, and in HSL it's 351°, 4%, 38%.