Tints & Shades
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Scale from white (50) through Air Force Blue (500) to black (900), interpolated in Lab color space.
Color Values
- HEX
- #5D8AA8
- RGB
- rgb(93, 138, 168)
- HSL
- hsl(204, 30%, 51%)
- OKLCH
- oklch(0.613 0.067 238)
- CMYK
- cmyk(45%, 18%, 0%, 34%)
--color-air-force-bluebg-[#5D8AA8]Accessibility
Score: 39/100On White (#FFF)
3.71:1
On Black (#000)
5.67:1
On Light Gray (#F5F5F5)
3.4:1
Best text color on this background:
Design Applications
background-color: #5D8AA8
color: #5D8AA8
bg-[#5D8AA8] text-[#000000]
border-left: 4px solid #5D8AA8
Color Harmonies
Complementary
Bister
#3D2B1F
Split-Complementary
Similar Colors
Color Meaning & Psychology
Blue is the world's most universally preferred color across cultures. It slows respiration, lowers blood pressure, and promotes calm — the physiological opposite of red. Blue's associations with sky and water make it feel limitless, trustworthy, and reliable. In corporate design, blue dominates banking, insurance, healthcare, and technology precisely because it communicates stability. Dark navy conveys authority and tradition; royal blues suggest quality and aspiration; sky blues feel open and optimistic; teal bridges trust with modernity. The primary limitation of blue is food — it suppresses appetite, with almost no naturally blue foods existing in nature. At medium lightness, it is the most versatile tone of this hue family — readable as text on light backgrounds, yet vibrant enough as a visual accent.
Industry Usage
Common contexts and industries where Air Force Blue is applied in professional design.
- Banking, insurance, and financial institutions
- Healthcare and medical device companies
- Enterprise software and SaaS platforms
- Government and public sector organizations
- Airlines and aviation brands
- Communication and social networking apps
- Cybersecurity and data protection products
- Pharmaceutical companies and clinical products
Accessibility Considerations
Normal Text
Fails AA
4.5:1 minimum required
Large Text
Passes AA Large
3:1 minimum required
UI Components
Meets 1.4.11
3:1 for non-text UI
Air Force Blue is a light color. Use black (#000000) text on top of it for maximum readability (5.67:1). Avoid white text on this background.
CSS & Code Examples
Background
background-color: #5D8AA8;Text
color: #5D8AA8;Border
border: 2px solid #5D8AA8;Box Shadow
box-shadow: 0 4px 20px #5D8AA840;Gradient
background: linear-gradient(135deg, #5D8AA8, #8dbada);Tailwind-style
--color-air-force-blue: #5D8AA8;Tailwind CSS Utilities
Use arbitrary value syntax in Tailwind CSS to apply Air Force Blue without a custom config.
Background
bg-[#5D8AA8]Text
text-[#5D8AA8]Border
border-[#5D8AA8]Ring
ring-[#5D8AA8]Fill
fill-[#5D8AA8]From (gradient)
from-[#5D8AA8]Via (gradient)
via-[#5D8AA8]To (gradient)
to-[#5D8AA8]Design Tokens
Ready-to-use Air Force Blue design token in CSS custom properties, SCSS, Tailwind v3/v4, and JSON formats.
CSS Custom Properties
:root {
--color-air-force-blue: #5D8AA8;
--color-air-force-blue-rgb: 93, 138, 168;
--color-air-force-blue-hsl: 204, 30%, 51%;
}SCSS Variables
$color-air-force-blue: #5D8AA8; $color-air-force-blue-rgb: 93, 138, 168; $color-air-force-blue-hsl: 204, 30%, 51%;
Tailwind v3 Config
// tailwind.config.js
module.exports = {
theme: {
extend: {
colors: {
'air-force-blue': '#5D8AA8',
},
},
},
};Tailwind v4 (@theme)
/* tailwind.css */
@theme {
--color-air-force-blue: #5D8AA8;
}JSON Design Token (W3C format)
{
"air-force-blue": {
"value": "#5D8AA8",
"type": "color",
"description": "Air Force Blue — #5D8AA8"
}
}More blue colors
View all →What Does Air Force Blue Mean? Color Psychology & Cultural Symbolism
Where red demands action and green signals approval, blue invites consideration. Air Force Blue (#5D8AA8) operates in this reflective register—its medium character at 51% lightness creating space for calm to develop gradually rather than announce itself.
- Across color psychology research, blue consistently tests high for "trustworthiness" associations, making Air Force Blue a reliable vehicle for calm in cross-demographic audiences.
- Brand designers draw on blue-family tones to project stability and competence—values that Air Force Blue communicates in a medium key.
- At 30% saturation, Air Force Blue reads as subdued—neither overwhelming nor passive, landing in the trust, reliability, calm, and professionalism zone with measured confidence.
- Air Force Blue's medium lightness (51%) shifts its psychological register: a balanced mid-tone that embodies trust, reliability, calm, and professionalism at its most direct.
In a world of visual noise, Air Force Blue earns attention through steadiness. Use it where you need to be believed.
How to Use Air Force Blue in Design: Applications, Pairings & Best Practices
Air Force Blue's accessibility profile makes it one of the more designer-friendly choices in the warm-cool spectrum. Its medium quality at 51% lightness typically produces workable contrast ratios for both text and UI applications.
- Avoid: food contexts where it suppresses appetite (the only major color with no natural blue foods), extreme urgency signals, and applications targeting very young children where warmer colors perform better.
- Color harmonies: Air Force Blue's complementary color creates a high-energy split ideal for promotional design; its analogous palette (±30° hue) builds cohesive, monochromatic sophistication.
- Proportional use: Air Force Blue's subdued quality means it scales well across proportions—from full-bleed backgrounds to single-pixel borders—making it an unusually versatile palette component.
- Air Force Blue creates strong legibility with black text overlays (5.7:1 contrast ratio), making it a reliable background or surface color in design systems
- Typography: Air Force Blue as text requires a dark background; its 51% lightness means it provides 3.7:1 contrast on white, not meeting WCAG AA.
In a world of visual noise, Air Force Blue earns attention through steadiness. Use it where you need to be believed.
Air Force Blue Accessibility: WCAG Contrast Ratios, Color Blindness & Inclusive Design
Air Force Blue (#5D8AA8) reaches 5.67:1 contrast with black text—meeting WCAG 2.1 AA minimum of 4.5:1 for normal text and 3:1 for large text. It clears standard production accessibility requirements. Relative luminance: 23.3%.
- As text on white (#FFFFFF): 3.71:1 — AA (large text only)
- As text on black (#000000): 5.67:1 — AA ✓
- Best text color on Air Force Blue background: Black (#000000) at 5.67:1
- WCAG 2.1 luminance: 23.3% — mid-range luminance—it sits in the transition zone where both dark and light text approaches require testing against the 4.5:1 WCAG threshold
- Air Force Blue qualifies for normal body text and all larger sizes (AA).
- Color blindness consideration: tritanopia (blue-yellow color blindness, ~0.003% of population) may affect how this color reads. While rare, for maximum accessibility supplement color signals with text or icon indicators in critical states.
Air Force Blue's WCAG profile makes it a compliant choice for most text applications.
Air Force Blue in Industry: Branding, Design & Market Applications
Air Force Blue (#5D8AA8) is most at home in industries where trust, reliability, calm, and professionalism are key brand values. Its medium quality makes it particularly effective in Finance & Banking contexts, where the subdued saturation signals reliability at exactly the right register.
- Finance & Banking: Blue is the most trusted color in financial services—a global design convention built over decades. It signals fiduciary reliability, stability, and the conservative stewardship that depositors and investors need to feel comfortable transferring wealth. (examples: Capital One, PayPal, Visa) Dark navy communicates established tradition; mid-tone blues suggest accessible, modern banking. Avoid pure bright blue for legacy institutions.
- Technology: Technology brands use blue to communicate intelligence, reliability, and forward-thinking professionalism. From legacy enterprise software to consumer apps, blue provides a neutral credibility that scales across markets and cultures. (examples: Notion, Slack, Salesforce) Varying the tone of blue is how tech brands differentiate: sky blue for friendliness (consumer apps), royal blue for confidence (productivity tools), navy for enterprise seriousness.
- Healthcare: Healthcare's use of blue is a trust transfer from corporate credibility to clinical reliability. Patients associate blue with cleanliness, precision, and medical competence—making it the second most common healthcare color after white. (examples: CVS Health, Mayo Clinic, Kaiser Permanente) Teal-blue works particularly well for health tech and telemedicine, balancing clinical trust with digital accessibility.
- Brand positioning: Air Force Blue is best suited for brands projecting stability, competence, professionalism. Categories outside this positioning—food contexts where it suppresses appetite (the only major color with no natural blue foods)—tend to see weaker results.
- Adjacent applications: Beyond primary industries, Air Force Blue works effectively in trust-critical applications, government services, B2B software—contexts where reliability serves a secondary but reinforcing role.
The industries where Air Force Blue performs best are those where the audience expects reliability. Build brand strategy around this alignment, not against it.
Accessibility & Design Guides
Frequently Asked Questions
- What is the hex code for Air Force Blue? ▾
- The hex code for Air Force Blue is #5D8AA8. Its RGB values are rgb(93, 138, 168) and its HSL values are hsl(204, 30%, 51%).
- What does Air Force Blue mean in design? ▾
- Blue is the world's most universally preferred color across cultures. It slows respiration, lowers blood pressure, and promotes calm — the physiological opposite of red. Blue's associations with sky and water make it feel limitless, trustworthy, and reliable. In corporate design, blue dominates banking, insurance, healthcare, and technology precisely because it communicates stability. Dark navy conveys authority and tradition; royal blues suggest quality and aspiration; sky blues feel open and optimistic; teal bridges trust with modernity. The primary limitation of blue is food — it suppresses appetite, with almost no naturally blue foods existing in nature. At medium lightness, it is the most versatile tone of this hue family — readable as text on light backgrounds, yet vibrant enough as a visual accent.
- Is Air Force Blue WCAG accessible? ▾
- Air Force Blue (#5D8AA8) passes WCAG AA-large on white with a 3.71:1 contrast ratio. Its overall accessibility score is 39/100.
- What colors go well with Air Force Blue? ▾
- Air Force Blue pairs well with its complementary color Bister (#3D2B1F). Analogous colors like Turquoise and Sky Cyan also work harmoniously. Check the Color Harmonies section above for the full palette.
- What is Air Force Blue used for? ▾
- Air Force Blue is commonly used for: Banking, insurance, and financial institutions; Healthcare and medical device companies; Enterprise software and SaaS platforms; Government and public sector organizations; Airlines and aviation brands.
- What are the CSS and Tailwind values for Air Force Blue? ▾
- In CSS, use `color: #5D8AA8` or `background-color: #5D8AA8`. The CSS custom property is `--color-air-force-blue: #5D8AA8`. In Tailwind CSS, use the arbitrary value class `bg-[#5D8AA8]` for backgrounds or `text-[#5D8AA8]` for text.