Color #00421A Color / Colour Code #00421A
This page shows the hex color code for color #00421a (#00421A). The colour is a green tone with 100% saturation and 13% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #00421A against common backgrounds.
Complementary Colors
#00421A paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 114, 144, and 174 degrees for harmonious combinations.
Triadic Palette
Three colors at 144, 264, and 24 degrees.
Color Palettes Using #00421A
Five shades at lightness levels 15% through 85% while keeping hue at 144 and saturation at 100%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 144 to 189 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 144 with its complement at 324 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 #00421A
Lightness variations at hue 144 and 100% saturation.
CSS Gradients with #00421A
Design Use Cases for #00421A
High-Impact Accent
With 100% saturation, #00421A 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 13% lightness, #00421A 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
#00421A falls in the green range (hue 144). 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 #00421A (hue 144) to its complement at hue 324. For a subtler effect, try pairing with an analogous color at hue 174. Use CSS: background: linear-gradient(135deg, #00421a, #420028);
CSS Code for #00421A
Similar Colors
Colors visually similar to #00421A based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #00421A across image editing and color design tools.
About Color #00421A (#00421A)
#00421A is a green color (colour) with RGB channel values of 0 red, 66 green, and 26 blue. The green channel is dominant by a ratio of 66.0:1 over the weakest channel. In HSL terms, the hue sits at 144 degrees with 100% saturation and 13% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #00421A is 42/255 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 100% cyan, 0% magenta, 61% yellow, and 74% key (black).
The WCAG contrast ratio of #00421A against white is 11.70:1 and against black is 1.79:1. 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 #420028 creates maximum visual tension when paired with #00421A. For more harmonious color combinations, use the analogous colours #074200 and #00423C, 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 #00421A
- 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 #00421A?
- #00421A is Color #00421A, a green color (colour) with RGB(0, 66, 26), HSL(144, 100%, 13%), and CMYK(100%, 0%, 61%, 74%). Its perceived brightness is 42/255.
- Is #00421A accessible for text?
- Against white, #00421A has a contrast ratio of 11.70:1 (passes AA for normal text). Against black, it has 1.79:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #00421A?
- The complementary colour is #420028 (hue 324). For subtle color combinations, use analogous colours #074200 and #00423C. The triadic palette adds #1B0042 and #421B00 for vibrant variety.
- How do I use #00421A in CSS?
- Use any format: color: #00421a; or rgb(0, 66, 26); or hsl(144, 100%, 13%). For CSS custom properties: --color-primary: 144 100% 13%; 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.