Ref. #5D9B9B · 5024
Pastel Blue
28%LRV Value
Cool (Blue)Undertone
Pastel Blue Technical Profile
What color is Pastel Blue? It's a deep cool blue with the hex code #5D9B9B. Colors similar to Pastel Blue include Vista Paint Cold North, Behr Semi-precious, Hirshfield's Cold North. Pastel Blue has a cool (blue) undertone, which affects how it pairs with trim, flooring, and adjacent wall colors. Its LRV of 28 gives Pastel Blue depth without going dark, which makes it a strong choice for accent walls, libraries, and rooms with abundant natural light. Pair it with cool whites like Chantilly Lace, walnut or rift-cut oak floors, and brushed nickel or polished chrome hardware. Brass accents add warmth for a layered look. Blues stay crisp under 4000K+ cool LEDs. Under 2700K warm bulbs they can read grayer or shift slightly purple — particularly true for mid-tone and saturated blues.
Colors Similar to Pastel Blue
Closest digital match based on color values. Always verify with physical samples.
Recommended Pairings
Colors That Work With Pastel Blue
Timeless pairing with clean white trim and a tonal accent wall
Side Walls
Pastel Blue
#5D9B9B
Accent Wall
Tonal Shift
A warm shift that adds depth without clashing.
#8095AB
Trim & Molding
Pure White
Crisp white trim for a clean, traditional look.
#FFFFFF
Color Palettes for Pastel Blue
Color harmonies based on color theory — each swatch links to the closest matching paint.
Opposite on the color wheel — creates vibrant contrast
Pastel Blue Room Palettes
Color schemes built around this color — each swatch links to the closest matching paint.
Warm & Inviting
Warm tones with cozy appeal — welcoming and comfortable
Cool & Calm
Cool hues with soft contrast — serene and restful
Bold Contrast
Complementary hues with punch — dynamic and striking
More blue colors from other brands
Cross-brand colors in the blue family — useful when you want a similar look from a different brand.
Pastel Blue — Frequently Asked Questions
What undertone does Pastel Blue have?
Pastel Blue by RAL has a cool (blue) undertone and belongs to the blue color family.
What colors match Pastel Blue from other brands?
The closest matches are Cold North by Vista Paint (#579A99), Semi-precious by Behr (#609896), Cold North by Hirshfield's (#559C9B). Always verify with physical samples.
What is the LRV of Pastel Blue?
Pastel Blue has an LRV of 28.1, where 0 is pure black and 100 is pure white.
Explore More with Pastel Blue
Related Reading
How to Match Paint Colors Across Brands
The science behind Delta E and CIEDE2000 — find a Behr equivalent of any Sherwin-Williams shade, or a Benjamin Moore alternative when your store is out of stock.
Understanding Paint Color Undertones
Why Pastel Blue's cool (blue) undertone matters more than its surface color — and how to read undertones in any paint chip.