Color #213803 Color / Colour Code #213803
This page shows the hex color code for color #213803 (#213803). The colour is a green tone with 90% saturation and 12% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #213803 against common backgrounds.
Complementary Colors
#213803 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 56, 86, and 116 degrees for harmonious combinations.
Triadic Palette
Three colors at 86, 206, and 326 degrees.
Color Palettes Using #213803
Five shades at lightness levels 15% through 85% while keeping hue at 86 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 86 to 131 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 86 with its complement at 266 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 #213803
Lightness variations at hue 86 and 90% saturation.
CSS Gradients with #213803
Design Use Cases for #213803
High-Impact Accent
With 90% saturation, #213803 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.
Dark Mode Background
At just 12% lightness, #213803 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.
Success & Growth Indicators
#213803 falls in the green range (hue 86). Green universally represents success, growth, and safety. Use it for confirmation messages, positive chart data, eco-friendly badges, and health metrics. In financial dashboards, green indicates gains and positive performance.
Gradient Pairing
Create a gradient from #213803 (hue 86) to its complement at hue 266. For a subtler effect, try pairing with an analogous color at hue 116. Use CSS: background: linear-gradient(135deg, #213803, #1b033a);
CSS Code for #213803
Similar Colors
Colors visually similar to #213803 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #213803 across image editing and color design tools.
About Color #213803 (#213803)
#213803 is a green color (colour) with RGB channel values of 33 red, 56 green, and 3 blue. The green channel is dominant by a ratio of 18.7:1 over the weakest channel. In HSL terms, the hue sits at 86 degrees with 90% saturation and 12% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #213803 is 43/255 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 41% cyan, 0% magenta, 95% yellow, and 78% key (black).
The WCAG contrast ratio of #213803 against white is 12.87:1 and against black is 1.63:1. 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 #1B033A creates maximum visual tension when paired with #213803. For more harmonious color combinations, use the analogous colours #3A3603 and #073A03, 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 #213803
- 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 #213803?
- #213803 is Color #213803, a green color (colour) with RGB(33, 56, 3), HSL(86, 90%, 12%), and CMYK(41%, 0%, 95%, 78%). Its perceived brightness is 43/255.
- Is #213803 accessible for text?
- Against white, #213803 has a contrast ratio of 12.87:1 (passes AA for normal text). Against black, it has 1.63:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #213803?
- The complementary colour is #1B033A (hue 266). For subtle color combinations, use analogous colours #3A3603 and #073A03. The triadic palette adds #03223A and #3A0322 for vibrant variety.
- How do I use #213803 in CSS?
- Use any format: color: #213803; or rgb(33, 56, 3); or hsl(86, 90%, 12%). For CSS custom properties: --color-primary: 86 90% 12%; 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.