Dark Blue Color / Colour Code #121621
This page shows the hex color code for dark blue (#121621). The colour is a blue tone with 29% saturation and 10% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #121621 against common backgrounds.
Complementary Colors
#121621 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 194, 224, and 254 degrees for harmonious combinations.
Triadic Palette
Three colors at 224, 344, and 104 degrees.
Color Palettes Using #121621
Five shades at lightness levels 15% through 85% while keeping hue at 224 and saturation at 29%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 224 to 269 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 224 with its complement at 44 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 #121621
Lightness variations at hue 224 and 29% saturation.
CSS Gradients with #121621
Design Use Cases for #121621
Muted Accent Color
With 29% saturation, #121621 has a subtle, sophisticated quality. This level of desaturation works well for secondary buttons, inactive states, subtle borders, and backgrounds that need a hint of color without being distracting. Muted colors communicate restraint and professionalism.
Dark Mode Background
At just 10% lightness, #121621 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.
Trust & Professional Identity
#121621 sits in the blue range (hue 224). Blue is the world's most popular color for corporate identities because it conveys trust, stability, and competence. Use it for navigation bars, link text, form focus states, and any element where user confidence matters. Financial, healthcare, and technology brands rely heavily on this hue range.
Gradient Pairing
Create a gradient from #121621 (hue 224) to its complement at hue 44. For a subtler effect, try pairing with an analogous color at hue 254. Use CSS: background: linear-gradient(135deg, #121621, #211d12);
CSS Code for #121621
Similar Colors
Colors visually similar to #121621 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #121621 across image editing and color design tools.
About Dark Blue (#121621)
#121621 is a blue color (colour) with RGB channel values of 18 red, 22 green, and 33 blue. The blue channel is dominant with a relatively balanced channel distribution. In HSL terms, the hue sits at 224 degrees with 29% saturation and 10% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #121621 is 22/255 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 45% cyan, 33% magenta, 0% yellow, and 87% key (black).
The WCAG contrast ratio of #121621 against white is 18.07:1 and against black is 1.16:1. 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 #211D12 creates maximum visual tension when paired with #121621. For more harmonious color combinations, use the analogous colours #121D21 and #161221, 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 #121621
- 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 #121621?
- #121621 is Dark Blue, a blue color (colour) with RGB(18, 22, 33), HSL(224, 29%, 10%), and CMYK(45%, 33%, 0%, 87%). Its perceived brightness is 22/255.
- Is #121621 accessible for text?
- Against white, #121621 has a contrast ratio of 18.07:1 (passes AA for normal text). Against black, it has 1.16:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #121621?
- The complementary colour is #211D12 (hue 44). For subtle color combinations, use analogous colours #121D21 and #161221. The triadic palette adds #211216 and #162112 for vibrant variety.
- How do I use #121621 in CSS?
- Use any format: color: #121621; or rgb(18, 22, 33); or hsl(224, 29%, 10%). For CSS custom properties: --color-primary: 224 29% 10%; 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.