Color #F66C51 Color / Colour Code #F66C51
This page shows the hex color code for color #f66c51 (#F66C51). The colour is a red tone with 90% saturation and 64% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #F66C51 against common backgrounds.
Complementary Colors
#F66C51 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 340, 10, and 40 degrees for harmonious combinations.
Triadic Palette
Three colors at 10, 130, and 250 degrees.
Color Palettes Using #F66C51
Five shades at lightness levels 15% through 85% while keeping hue at 10 and saturation at 90%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 10 to 55 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 10 with its complement at 190 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 #F66C51
Lightness variations at hue 10 and 90% saturation.
CSS Gradients with #F66C51
Design Use Cases for #F66C51
High-Impact Accent
With 90% saturation, #F66C51 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 64% lightness, #F66C51 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
#F66C51 falls in the red spectrum (hue 10). 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 #F66C51 (hue 10) to its complement at hue 190. For a subtler effect, try pairing with an analogous color at hue 40. Use CSS: background: linear-gradient(135deg, #f66c51, #51daf6);
CSS Code for #F66C51
Similar Colors
Colors visually similar to #F66C51 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #F66C51 across image editing and color design tools.
About Color #F66C51 (#F66C51)
#F66C51 is a red color (colour) with RGB channel values of 246 red, 108 green, and 81 blue. The red channel is dominant by a ratio of 3.0:1 over the weakest channel. In HSL terms, the hue sits at 10 degrees with 90% saturation and 64% lightness, placing it in the warm range of the colour spectrum.
The perceived brightness of #F66C51 is 146/255 using the ITU-R BT.601 luma formula (0.299R + 0.587G + 0.114B). This is a medium-brightness color that can work with either dark or light text depending on font weight and size. For print production, the CMYK equivalent is 0% cyan, 56% magenta, 67% yellow, and 4% key (black).
The WCAG contrast ratio of #F66C51 against white is 2.92:1 and against black is 7.18:1. This does not meet AA requirements on white. Use it on dark backgrounds where it achieves 7.18:1, or use it exclusively for decorative purposes.
The complementary colour #51DAF6 creates maximum visual tension when paired with #F66C51. For more harmonious color combinations, use the analogous colours #F65188 and #F6BF51, 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 #F66C51
- 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 #F66C51?
- #F66C51 is Color #F66C51, a red color (colour) with RGB(246, 108, 81), HSL(10, 90%, 64%), and CMYK(0%, 56%, 67%, 4%). Its perceived brightness is 146/255.
- Is #F66C51 accessible for text?
- Against white, #F66C51 has a contrast ratio of 2.92:1 (fails AA for normal text). Against black, it has 7.18:1 (passes AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #F66C51?
- The complementary colour is #51DAF6 (hue 190). For subtle color combinations, use analogous colours #F65188 and #F6BF51. The triadic palette adds #51F66C and #6C51F6 for vibrant variety.
- How do I use #F66C51 in CSS?
- Use any format: color: #f66c51; or rgb(246, 108, 81); or hsl(10, 90%, 64%). For CSS custom properties: --color-primary: 10 90% 64%; 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.