Color #3F121A Color / Colour Code #3F121A
This page shows the hex color code for color #3f121a (#3F121A). The colour is a red tone with 56% saturation and 16% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #3F121A against common backgrounds.
Complementary Colors
#3F121A paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 319, 349, and 19 degrees for harmonious combinations.
Triadic Palette
Three colors at 349, 109, and 229 degrees.
Color Palettes Using #3F121A
Five shades at lightness levels 15% through 85% while keeping hue at 349 and saturation at 56%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 349 to 34 degrees create a warm, unified palette. This analogous scheme works for marketing materials, seasonal campaigns, and any design that needs visual warmth without clashing colors.
Combines the base color at hue 349 with its complement at 169 and two adjacent cool tones. This split-complementary approach provides strong visual contrast while remaining more balanced than a pure complementary scheme.
Five evenly spaced hues at 40% saturation and 80% lightness. Pastels are gentle on the eyes and work well for dashboards, onboarding screens, category tags, and any interface where multiple distinct colors are needed without visual aggression.
Shades & Tints of #3F121A
Lightness variations at hue 349 and 56% saturation.
CSS Gradients with #3F121A
Design Use Cases for #3F121A
Balanced UI Color
At 56% saturation, #3F121A strikes a balance between vibrancy and restraint. This makes it versatile for primary UI elements like navigation bars, card headers, and form accents. It draws attention without overwhelming adjacent content.
Deep Accent & Text Color
#3F121A at 16% lightness is dark enough for readable body text on light backgrounds while retaining its red character. Use for headings, emphasized text, or deep accent borders. It provides contrast without the harshness of pure black.
Urgency & Energy Signaling
#3F121A falls in the red spectrum (hue 349). Red triggers urgency and excitement, making it effective for sale badges, countdown timers, error messages, and "limited time" labels. In data visualization, use it to flag negative values or critical thresholds.
Gradient Pairing
Create a gradient from #3F121A (hue 349) to its complement at hue 169. For a subtler effect, try pairing with an analogous color at hue 19. Use CSS: background: linear-gradient(135deg, #3f121a, #124037);
CSS Code for #3F121A
Similar Colors
Colors visually similar to #3F121A based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #3F121A across image editing and color design tools.
About Color #3F121A (#3F121A)
#3F121A is a red color (colour) with RGB channel values of 63 red, 18 green, and 26 blue. The red channel is dominant by a ratio of 3.5:1 over the weakest channel. In HSL terms, the hue sits at 349 degrees with 56% saturation and 16% lightness, placing it in the warm range of the colour spectrum.
The perceived brightness of #3F121A is 32/255 using the ITU-R BT.601 luma formula (0.299R + 0.587G + 0.114B). This appears dark to the human eye, so pair it with light text for adequate readability. For print production, the CMYK equivalent is 0% cyan, 71% magenta, 59% yellow, and 75% key (black).
The WCAG contrast ratio of #3F121A against white is 16.00:1 and against black is 1.31:1. This exceeds the AAA requirement (7:1) for normal text on white, making it excellent for body text and small UI labels on light backgrounds.
The complementary colour #124037 creates maximum visual tension when paired with #3F121A. For more harmonious color combinations, use the analogous colours #401231 and #402012, which sit 30 degrees on either side of the hue wheel. To build a complete design system, start with the monochromatic scale above for consistent shade variations, then add one complementary or triadic accent for interactive elements.
How to Explore Color #3F121A
- Enter your color value in HEX format.
- The tool converts it to RGB, HSL, CMYK format in real time.
- Copy the converted value to your clipboard.
What is HEX to RGB, HSL, CMYK color conversion
Converting from HEX to RGB, HSL, CMYK translates a color value between two different color models. Different color models are used in web design (HEX, RGB), print (CMYK), and color theory (HSL, HSV).
Related Tools & Colors
Frequently Asked Questions
- What color / colour is #3F121A?
- #3F121A is Color #3F121A, a red color (colour) with RGB(63, 18, 26), HSL(349, 56%, 16%), and CMYK(0%, 71%, 59%, 75%). Its perceived brightness is 32/255.
- Is #3F121A accessible for text?
- Against white, #3F121A has a contrast ratio of 16.00:1 (passes AA for normal text). Against black, it has 1.31:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #3F121A?
- The complementary colour is #124037 (hue 169). For subtle color combinations, use analogous colours #401231 and #402012. The triadic palette adds #1A4012 and #121A40 for vibrant variety.
- How do I use #3F121A in CSS?
- Use any format: color: #3f121a; or rgb(63, 18, 26); or hsl(349, 56%, 16%). For CSS custom properties: --color-primary: 349 56% 16%; then use it as hsl(var(--color-primary)).
- Is this color / colour explorer free?
- Yes, completely free with no signup required. All colour calculations run in your browser. You can explore any valid hex color code, not just the pre-generated palette.