Color #1D2B3F Color / Colour Code #1D2B3F
This page shows the hex color code for color #1d2b3f (#1D2B3F). The colour is a blue tone with 37% saturation and 18% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #1D2B3F against common backgrounds.
Complementary Colors
#1D2B3F paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 185, 215, and 245 degrees for harmonious combinations.
Triadic Palette
Three colors at 215, 335, and 95 degrees.
Color Palettes Using #1D2B3F
Five shades at lightness levels 15% through 85% while keeping hue at 215 and saturation at 37%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 215 to 260 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 215 with its complement at 35 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 #1D2B3F
Lightness variations at hue 215 and 37% saturation.
CSS Gradients with #1D2B3F
Design Use Cases for #1D2B3F
Balanced UI Color
At 37% saturation, #1D2B3F 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
#1D2B3F at 18% lightness is dark enough for readable body text on light backgrounds while retaining its blue character. Use for headings, emphasized text, or deep accent borders. It provides contrast without the harshness of pure black.
Trust & Professional Identity
#1D2B3F sits in the blue range (hue 215). 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 #1D2B3F (hue 215) to its complement at hue 35. For a subtler effect, try pairing with an analogous color at hue 245. Use CSS: background: linear-gradient(135deg, #1d2b3f, #3f311d);
CSS Code for #1D2B3F
Similar Colors
Colors visually similar to #1D2B3F based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #1D2B3F across image editing and color design tools.
About Color #1D2B3F (#1D2B3F)
#1D2B3F is a blue color (colour) with RGB channel values of 29 red, 43 green, and 63 blue. The blue channel is dominant by a ratio of 2.2:1 over the weakest channel. In HSL terms, the hue sits at 215 degrees with 37% saturation and 18% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #1D2B3F 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 54% cyan, 32% magenta, 0% yellow, and 75% key (black).
The WCAG contrast ratio of #1D2B3F against white is 14.29:1 and against black is 1.47:1. 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 #3F311D creates maximum visual tension when paired with #1D2B3F. For more harmonious color combinations, use the analogous colours #1D3C3F and #201D3F, 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 #1D2B3F
- 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 #1D2B3F?
- #1D2B3F is Color #1D2B3F, a blue color (colour) with RGB(29, 43, 63), HSL(215, 37%, 18%), and CMYK(54%, 32%, 0%, 75%). Its perceived brightness is 41/255.
- Is #1D2B3F accessible for text?
- Against white, #1D2B3F has a contrast ratio of 14.29:1 (passes AA for normal text). Against black, it has 1.47:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #1D2B3F?
- The complementary colour is #3F311D (hue 35). For subtle color combinations, use analogous colours #1D3C3F and #201D3F. The triadic palette adds #3F1D2B and #2B3F1D for vibrant variety.
- How do I use #1D2B3F in CSS?
- Use any format: color: #1d2b3f; or rgb(29, 43, 63); or hsl(215, 37%, 18%). For CSS custom properties: --color-primary: 215 37% 18%; 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.