Color #123B21 Color / Colour Code #123B21
This page shows the hex color code for color #123b21 (#123B21). The colour is a green tone with 53% saturation and 15% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #123B21 against common backgrounds.
Complementary Colors
#123B21 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 112, 142, and 172 degrees for harmonious combinations.
Triadic Palette
Three colors at 142, 262, and 22 degrees.
Color Palettes Using #123B21
Five shades at lightness levels 15% through 85% while keeping hue at 142 and saturation at 53%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 142 to 187 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 142 with its complement at 322 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 #123B21
Lightness variations at hue 142 and 53% saturation.
CSS Gradients with #123B21
Design Use Cases for #123B21
Balanced UI Color
At 53% saturation, #123B21 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.
Deep Accent & Text Color
#123B21 at 15% lightness is dark enough for readable body text on light backgrounds while retaining its green character. Use for headings, emphasized text, or deep accent borders. It provides contrast without the harshness of pure black.
Success & Growth Indicators
#123B21 falls in the green range (hue 142). 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 #123B21 (hue 142) to its complement at hue 322. For a subtler effect, try pairing with an analogous color at hue 172. Use CSS: background: linear-gradient(135deg, #123b21, #3b122c);
CSS Code for #123B21
Similar Colors
Colors visually similar to #123B21 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #123B21 across image editing and color design tools.
About Color #123B21 (#123B21)
#123B21 is a green color (colour) with RGB channel values of 18 red, 59 green, and 33 blue. The green channel is dominant by a ratio of 3.3:1 over the weakest channel. In HSL terms, the hue sits at 142 degrees with 53% saturation and 15% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #123B21 is 44/255 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 69% cyan, 0% magenta, 44% yellow, and 77% key (black).
The WCAG contrast ratio of #123B21 against white is 12.55:1 and against black is 1.67:1. 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 #3B122C creates maximum visual tension when paired with #123B21. For more harmonious color combinations, use the analogous colours #173B12 and #123B35, 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 #123B21
- 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 #123B21?
- #123B21 is Color #123B21, a green color (colour) with RGB(18, 59, 33), HSL(142, 53%, 15%), and CMYK(69%, 0%, 44%, 77%). Its perceived brightness is 44/255.
- Is #123B21 accessible for text?
- Against white, #123B21 has a contrast ratio of 12.55:1 (passes AA for normal text). Against black, it has 1.67:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #123B21?
- The complementary colour is #3B122C (hue 322). For subtle color combinations, use analogous colours #173B12 and #123B35. The triadic palette adds #21123B and #3B2112 for vibrant variety.
- How do I use #123B21 in CSS?
- Use any format: color: #123b21; or rgb(18, 59, 33); or hsl(142, 53%, 15%). For CSS custom properties: --color-primary: 142 53% 15%; 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.