Color #00618A Color / Colour Code #00618A
This page shows the hex color code for color #00618a (#00618A). The colour is a blue tone with 100% saturation and 27% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #00618A against common backgrounds.
Complementary Colors
#00618A paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 168, 198, and 228 degrees for harmonious combinations.
Triadic Palette
Three colors at 198, 318, and 78 degrees.
Color Palettes Using #00618A
Five shades at lightness levels 15% through 85% while keeping hue at 198 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 198 to 243 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 198 with its complement at 18 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 #00618A
Lightness variations at hue 198 and 100% saturation.
CSS Gradients with #00618A
Design Use Cases for #00618A
High-Impact Accent
With 100% saturation, #00618A 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.
Deep Accent & Text Color
#00618A at 27% 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
#00618A sits in the blue range (hue 198). 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 #00618A (hue 198) to its complement at hue 18. For a subtler effect, try pairing with an analogous color at hue 228. Use CSS: background: linear-gradient(135deg, #00618a, #8a2900);
CSS Code for #00618A
Similar Colors
Colors visually similar to #00618A based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #00618A across image editing and color design tools.
About Color #00618A (#00618A)
#00618A is a blue color (colour) with RGB channel values of 0 red, 97 green, and 138 blue. The blue channel is dominant by a ratio of 138.0:1 over the weakest channel. In HSL terms, the hue sits at 198 degrees with 100% saturation and 27% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #00618A is 73/255 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, 30% magenta, 0% yellow, and 46% key (black).
The WCAG contrast ratio of #00618A against white is 6.83:1 and against black is 3.08:1. This meets the AA requirement (4.5:1) for normal text on white. For AAA compliance, consider darkening to at least 19% lightness.
The complementary colour #8A2900 creates maximum visual tension when paired with #00618A. For more harmonious color combinations, use the analogous colours #008A6E and #001C8A, 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 #00618A
- 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 #00618A?
- #00618A is Color #00618A, a blue color (colour) with RGB(0, 97, 138), HSL(198, 100%, 27%), and CMYK(100%, 30%, 0%, 46%). Its perceived brightness is 73/255.
- Is #00618A accessible for text?
- Against white, #00618A has a contrast ratio of 6.83:1 (passes AA for normal text). Against black, it has 3.08:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #00618A?
- The complementary colour is #8A2900 (hue 18). For subtle color combinations, use analogous colours #008A6E and #001C8A. The triadic palette adds #8A0060 and #608A00 for vibrant variety.
- How do I use #00618A in CSS?
- Use any format: color: #00618a; or rgb(0, 97, 138); or hsl(198, 100%, 27%). For CSS custom properties: --color-primary: 198 100% 27%; 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.