Color #123721 Color / Colour Code #123721
This page shows the hex color code for color #123721 (#123721). The colour is a green tone with 51% saturation and 14% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #123721 against common backgrounds.
Complementary Colors
#123721 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 #123721
Five shades at lightness levels 15% through 85% while keeping hue at 144 and saturation at 51%. 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 #123721
Lightness variations at hue 144 and 51% saturation.
CSS Gradients with #123721
Design Use Cases for #123721
Balanced UI Color
At 51% saturation, #123721 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 14% lightness, #123721 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
#123721 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 #123721 (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, #123721, #361127);
CSS Code for #123721
Similar Colors
Colors visually similar to #123721 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #123721 across image editing and color design tools.
About Color #123721 (#123721)
#123721 is a green color (colour) with RGB channel values of 18 red, 55 green, and 33 blue. The green channel is dominant by a ratio of 3.1:1 over the weakest channel. In HSL terms, the hue sits at 144 degrees with 51% saturation and 14% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #123721 is 41/255 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 67% cyan, 0% magenta, 40% yellow, and 78% key (black).
The WCAG contrast ratio of #123721 against white is 13.17:1 and against black is 1.59:1. 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 #361127 creates maximum visual tension when paired with #123721. For more harmonious color combinations, use the analogous colours #153611 and #113632, 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 #123721
- 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 #123721?
- #123721 is Color #123721, a green color (colour) with RGB(18, 55, 33), HSL(144, 51%, 14%), and CMYK(67%, 0%, 40%, 78%). Its perceived brightness is 41/255.
- Is #123721 accessible for text?
- Against white, #123721 has a contrast ratio of 13.17:1 (passes AA for normal text). Against black, it has 1.59:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #123721?
- The complementary colour is #361127 (hue 324). For subtle color combinations, use analogous colours #153611 and #113632. The triadic palette adds #201136 and #362011 for vibrant variety.
- How do I use #123721 in CSS?
- Use any format: color: #123721; or rgb(18, 55, 33); or hsl(144, 51%, 14%). For CSS custom properties: --color-primary: 144 51% 14%; 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.