Color #F33307 Color / Colour Code #F33307
This page shows the hex color code for color #f33307 (#F33307). The colour is a red tone with 94% saturation and 49% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #F33307 against common backgrounds.
Complementary Colors
#F33307 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 341, 11, and 41 degrees for harmonious combinations.
Triadic Palette
Three colors at 11, 131, and 251 degrees.
Color Palettes Using #F33307
Five shades at lightness levels 15% through 85% while keeping hue at 11 and saturation at 94%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 11 to 56 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 11 with its complement at 191 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 #F33307
Lightness variations at hue 11 and 94% saturation.
CSS Gradients with #F33307
Design Use Cases for #F33307
High-Impact Accent
With 94% saturation, #F33307 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.
Primary Interface Color
At 49% lightness, #F33307 is in the mid-range, making it ideal for interactive elements like buttons, links, and selected states. This lightness level ensures good contrast against both light and dark adjacent elements in most layouts.
Urgency & Energy Signaling
#F33307 falls in the red spectrum (hue 11). 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 #F33307 (hue 11) to its complement at hue 191. For a subtler effect, try pairing with an analogous color at hue 41. Use CSS: background: linear-gradient(135deg, #f33307, #07c7f2);
CSS Code for #F33307
Similar Colors
Colors visually similar to #F33307 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #F33307 across image editing and color design tools.
About Color #F33307 (#F33307)
#F33307 is a red color (colour) with RGB channel values of 243 red, 51 green, and 7 blue. The red channel is dominant by a ratio of 34.7:1 over the weakest channel. In HSL terms, the hue sits at 11 degrees with 94% saturation and 49% lightness, placing it in the warm range of the colour spectrum.
The perceived brightness of #F33307 is 103/255 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, 79% magenta, 97% yellow, and 5% key (black).
The WCAG contrast ratio of #F33307 against white is 3.97:1 and against black is 5.29:1. 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 5.29:1.
The complementary colour #07C7F2 creates maximum visual tension when paired with #F33307. For more harmonious color combinations, use the analogous colours #F20752 and #F2A807, 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 #F33307
- 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 #F33307?
- #F33307 is Color #F33307, a red color (colour) with RGB(243, 51, 7), HSL(11, 94%, 49%), and CMYK(0%, 79%, 97%, 5%). Its perceived brightness is 103/255.
- Is #F33307 accessible for text?
- Against white, #F33307 has a contrast ratio of 3.97:1 (fails AA for normal text). Against black, it has 5.29:1 (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 #F33307?
- The complementary colour is #07C7F2 (hue 191). For subtle color combinations, use analogous colours #F20752 and #F2A807. The triadic palette adds #07F233 and #3307F2 for vibrant variety.
- How do I use #F33307 in CSS?
- Use any format: color: #f33307; or rgb(243, 51, 7); or hsl(11, 94%, 49%). For CSS custom properties: --color-primary: 11 94% 49%; 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.