Color #23100B Color / Colour Code #23100B
This page shows the hex color code for color #23100b (#23100B). The colour is a red tone with 52% saturation and 9% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #23100B against common backgrounds.
Complementary Colors
#23100B 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 #23100B
Five shades at lightness levels 15% through 85% while keeping hue at 12 and saturation at 52%. 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 #23100B
Lightness variations at hue 12 and 52% saturation.
CSS Gradients with #23100B
Design Use Cases for #23100B
Balanced UI Color
At 52% saturation, #23100B 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.
Dark Mode Background
At just 9% lightness, #23100B 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
#23100B 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 #23100B (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, #23100b, #0b1e23);
CSS Code for #23100B
Similar Colors
Colors visually similar to #23100B based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #23100B across image editing and color design tools.
About Color #23100B (#23100B)
#23100B is a red color (colour) with RGB channel values of 35 red, 16 green, and 11 blue. The red channel is dominant by a ratio of 3.2:1 over the weakest channel. In HSL terms, the hue sits at 12 degrees with 52% saturation and 9% lightness, placing it in the warm range of the colour spectrum.
The perceived brightness of #23100B is 21/255 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, 54% magenta, 69% yellow, and 86% key (black).
The WCAG contrast ratio of #23100B against white is 18.25:1 and against black is 1.15:1. 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 #0B1E23 creates maximum visual tension when paired with #23100B. For more harmonious color combinations, use the analogous colours #230B12 and #231C0B, 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 #23100B
- 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 #23100B?
- #23100B is Color #23100B, a red color (colour) with RGB(35, 16, 11), HSL(12, 52%, 9%), and CMYK(0%, 54%, 69%, 86%). Its perceived brightness is 21/255.
- Is #23100B accessible for text?
- Against white, #23100B has a contrast ratio of 18.25:1 (passes AA for normal text). Against black, it has 1.15:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #23100B?
- The complementary colour is #0B1E23 (hue 192). For subtle color combinations, use analogous colours #230B12 and #231C0B. The triadic palette adds #0B2310 and #100B23 for vibrant variety.
- How do I use #23100B in CSS?
- Use any format: color: #23100b; or rgb(35, 16, 11); or hsl(12, 52%, 9%). For CSS custom properties: --color-primary: 12 52% 9%; 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.