Color #210D08 Color / Colour Code #210D08
This page shows the hex color code for color #210d08 (#210D08). The colour is a red tone with 61% saturation and 8% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #210D08 against common backgrounds.
Complementary Colors
#210D08 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 342, 12, and 42 degrees for harmonious combinations.
Triadic Palette
Three colors at 12, 132, and 252 degrees.
Color Palettes Using #210D08
Five shades at lightness levels 15% through 85% while keeping hue at 12 and saturation at 61%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 12 to 57 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 12 with its complement at 192 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 #210D08
Lightness variations at hue 12 and 61% saturation.
CSS Gradients with #210D08
Design Use Cases for #210D08
Vibrant Brand Color
#210D08 has a strong 61% saturation that makes it ideal for brand identity elements. Use it for logos, primary call-to-action buttons, hero section accents, and marketing materials where visual impact matters. This saturation level is eye-catching without being harsh.
Dark Mode Background
At just 8% lightness, #210D08 works as a dark mode background or overlay color. Dark backgrounds reduce eye strain in low-light environments and make bright accent colors pop. Pair with light text (minimum 4.5:1 contrast ratio) for readability.
Urgency & Energy Signaling
#210D08 falls in the red spectrum (hue 12). 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 #210D08 (hue 12) to its complement at hue 192. For a subtler effect, try pairing with an analogous color at hue 42. Use CSS: background: linear-gradient(135deg, #210d08, #081c21);
CSS Code for #210D08
Similar Colors
Colors visually similar to #210D08 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #210D08 across image editing and color design tools.
About Color #210D08 (#210D08)
#210D08 is a red color (colour) with RGB channel values of 33 red, 13 green, and 8 blue. The red channel is dominant by a ratio of 4.1:1 over the weakest channel. In HSL terms, the hue sits at 12 degrees with 61% saturation and 8% lightness, placing it in the warm range of the colour spectrum.
The perceived brightness of #210D08 is 18/255 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, 61% magenta, 76% yellow, and 87% key (black).
The WCAG contrast ratio of #210D08 against white is 18.65:1 and against black is 1.13:1. 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 #081C21 creates maximum visual tension when paired with #210D08. For more harmonious color combinations, use the analogous colours #21080F and #211908, 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 #210D08
- 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 #210D08?
- #210D08 is Color #210D08, a red color (colour) with RGB(33, 13, 8), HSL(12, 61%, 8%), and CMYK(0%, 61%, 76%, 87%). Its perceived brightness is 18/255.
- Is #210D08 accessible for text?
- Against white, #210D08 has a contrast ratio of 18.65:1 (passes AA for normal text). Against black, it has 1.13:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #210D08?
- The complementary colour is #081C21 (hue 192). For subtle color combinations, use analogous colours #21080F and #211908. The triadic palette adds #08210D and #0D0821 for vibrant variety.
- How do I use #210D08 in CSS?
- Use any format: color: #210d08; or rgb(33, 13, 8); or hsl(12, 61%, 8%). For CSS custom properties: --color-primary: 12 61% 8%; 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.