RAL Design

RAL 340 45 10

Muted Sandstone

RAL 340 45 10 Muted Sandstone occupies hue 340, lightness 45, and a moderate chroma of 10, a subdued mid-dark warm gold that bridges warm sand and grey like the surface of weathered sandstone blocks in an old cathedral. It is a natural choice for heritage structural elements, cinema interior millwork, and natural material colour coordination. The moderate saturation gives it a grounded, geological quality that blends seamlessly with concrete, natural stone, and weathered timber.

Time9:36 AM
Light
Technical Reference

Color Reference

Hex#645C50
RGBrgb(100, 92, 80)
HSLhsl(36°, 11%, 35%)
CMYKcmyk(0%, 8%, 20%, 61%)
RAL Design HLC
Hue340°
Lightness45
Chroma10

The RAL Design system uses Hue-Lightness-Chroma (HLC) notation. Hue describes the color family (0-360°), Lightness describes brightness (0-100), and Chroma describes saturation intensity (0-100+).

Color Analysis
RGB Composition
R
100
G
92
B
80
Temperature
WarmCool
Contrast Accessibility
White text
6.6:1Pass
Black text
3.2:1Fail

WCAG 2.1 AA requires 4.5:1 contrast for normal text. Results show this color as a background.

Spectrum & Perceptual Position

Hue Spectrum
60°120°180°240°300°360°
CIELAB a*b* Chromaticity
-3003060-3003060a* (Green ← → Red)b* (Blue ← → Yellow)
L* (Lightness)39
a* (Green-Red)1
b* (Blue-Yellow)8
L* (LCh)39
C* (Chroma)8
h° (Hue)83°

CIELAB is a perceptually uniform color space. Euclidean distance between two colors in this diagram closely matches human visual difference. The dot size shows your selected color; slightly larger dots are the nearest perceptual neighbors.

Color Harmonies

Build a Palette Around Muted Sandstone

Palette Generator

Select a harmony type, then press Space to reroll unlocked colors.

1 locked / 4 free

Reference + opposite hue with tonal variations

#2
Complementary
#3
Complementary
#4
Complementary
#5
Split Comp +
Pairwise Contrast Ratios
1.1:1
·
1.7:1
·
2.7:1
·
2.1:1

Contrast ratios follow WCAG 2.1 guidelines. Green (≥4.5:1) passes AA for normal text. Amber (≥3:1) passes for large text only. Grey indicates low contrast.

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