Color #FF372A Color / Colour Code #FF372A
This page shows the hex color code for color #ff372a (#FF372A). The colour is a red tone with 100% saturation and 58% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #FF372A against common backgrounds.
Complementary Colors
#FF372A paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 334, 4, and 34 degrees for harmonious combinations.
Triadic Palette
Three colors at 4, 124, and 244 degrees.
Color Palettes Using #FF372A
Five shades at lightness levels 15% through 85% while keeping hue at 4 and saturation at 100%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 4 to 49 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 4 with its complement at 184 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 #FF372A
Lightness variations at hue 4 and 100% saturation.
CSS Gradients with #FF372A
Design Use Cases for #FF372A
High-Impact Accent
With 100% saturation, #FF372A is highly vivid. Reserve this for elements that need maximum attention: primary action buttons, notification badges, error states, or promotional banners. Use sparingly alongside neutral tones to avoid visual fatigue.
Soft Accent & Highlight
With 58% lightness, #FF372A has a softer, more approachable quality. It works well for hover states, subtle highlights, progress indicators, and secondary UI elements. This lightness range is particularly effective for tag backgrounds and status indicators.
Urgency & Energy Signaling
#FF372A falls in the red spectrum (hue 4). 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 #FF372A (hue 4) to its complement at hue 184. For a subtler effect, try pairing with an analogous color at hue 34. Use CSS: background: linear-gradient(135deg, #ff372a, #29f1ff);
CSS Code for #FF372A
Similar Colors
Colors visually similar to #FF372A based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #FF372A across image editing and color design tools.
About Color #FF372A (#FF372A)
#FF372A is a red color (colour) with RGB channel values of 255 red, 55 green, and 42 blue. The red channel is dominant by a ratio of 6.1:1 over the weakest channel. In HSL terms, the hue sits at 4 degrees with 100% saturation and 58% lightness, placing it in the warm range of the colour spectrum.
The perceived brightness of #FF372A is 113/255 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, 78% magenta, 84% yellow, and 0% key (black).
The WCAG contrast ratio of #FF372A against white is 3.60:1 and against black is 5.83:1. This only passes AA for large text (18pt+) on white. For normal body text on white, darken the color or use it on a dark background where it achieves 5.83:1.
The complementary colour #29F1FF creates maximum visual tension when paired with #FF372A. For more harmonious color combinations, use the analogous colours #FF2986 and #FFA229, 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 #FF372A
- 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 #FF372A?
- #FF372A is Color #FF372A, a red color (colour) with RGB(255, 55, 42), HSL(4, 100%, 58%), and CMYK(0%, 78%, 84%, 0%). Its perceived brightness is 113/255.
- Is #FF372A accessible for text?
- Against white, #FF372A has a contrast ratio of 3.60:1 (fails AA for normal text). Against black, it has 5.83:1 (passes AA). It passes AA for large text (18pt+) on white. Use the contrast checker tool for custom background pairings.
- What colours pair well with #FF372A?
- The complementary colour is #29F1FF (hue 184). For subtle color combinations, use analogous colours #FF2986 and #FFA229. The triadic palette adds #29FF37 and #3729FF for vibrant variety.
- How do I use #FF372A in CSS?
- Use any format: color: #ff372a; or rgb(255, 55, 42); or hsl(4, 100%, 58%). For CSS custom properties: --color-primary: 4 100% 58%; 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.