#3F3545
Approximate Color Name: Charcoal
Closest CSS Color Name: DarkSlateGray (#2F4F4F)
Color Space Coordinates
Copyable codes for development, CSS styling, and print
WCAG 2.1 Contrast & Accessibility Audit
Evaluates readability standards for normal body text (4.5:1 AA / 7.0:1 AAA) and large headings (3.0:1 AA / 4.5:1 AAA)
Tonal Variations (Shades, Tints & Tones)
Calibrated step variations created by adding black (shades), white (tints), and gray (tones)
Harmonies for #3F3545 (Charcoal)
Classical color wheel pairings calculated from 360-degree rotational angles
Practical UI/UX Design Usage for #3F3545
Primary Buttons & Focus Rings
With an RGB luminance of 63, 53, 69, this shade works excellently with white text (#FFFFFF) for call-to-action buttons and form focus states.
Background Containers
To use #3F3545 as a card background or subtle surface tint, apply an opacity of 5% to 15% (bg-[#3F3545]/10 in Tailwind) to maintain high typography readability.
Data Visualization & Badges
Pair with its complementary accent #3B4535 or triadic partner #453F35 to distinguish distinct categories in charts and tables.
Explore More Popular Colors
View All Colors Directory →Tools & Utilities for #3F3545
Explore gradients, test contrast ratios, and generate monochromatic shades with #3F3545
Related Educational Guides
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Learn why digital colors look different when printed. Explore the physics of additive RGB light versus subtractive CMYK ink and how to avoid gamut clipping.