Blue-gray (#6699CC)
The hex code for Blue-gray is #6699CC. It is rgb(102, 153, 204) in RGB, hsl(210, 50%, 60%) in HSL, and about cmyk(50%, 25%, 0%, 20%) in CMYK — a light blue. Black text is the more readable choice on this background.
#6699CCrgb(102, 153, 204)hsl(210, 50%, 60%)hsv(210, 50%, 80%)cmyk(50%, 25%, 0%, 20%)oklch(66.8% 0.094 249.4)lab(61.18% -6.77 -32.01)lch(61.18% 32.72 258.06)Colors Closest to Blue-gray
Blue-gray is a registered color name, also listed as Livid. These are the named colors nearest to it, measured as CIE76 distance in CIELAB — a perceptual scale, so the ordering matches what the eye sees rather than how close the raw RGB numbers happen to sit.
Browse the full index of named colors A-Z or every blue in the library.
#6699CC Channel Values
How Blue-gray breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.
| Model | Channels | Notes |
|---|---|---|
| RGB | R 102 · G 153 · B 204 | 8-bit channels as sent to the display |
| HSL | H 210° · S 50% · L 60% | Easiest model for building lighter and darker variants |
| HSV | H 210° · S 50% · V 80% | Matches the picker in most design tools |
| CMYK | C 50% · M 25% · Y 0% · K 20% | Approximate ink mix; confirm with an ICC profile before printing |
| Luminance | 3:1 vs white · 6.99:1 vs black | WCAG 2.2 relative-luminance contrast ratios |
Text Contrast & Accessibility
WCAG 2.2 contrast ratios for text on a Blue-gray background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.
Need a specific ratio against another background? Open #6699CC in the contrast checker.
Colors That Go With Blue-gray
Pairings derived from color-wheel relationships. The complementary color sits opposite Blue-gray; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.
Tints & Shades of Blue-gray
Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.
Want a full 50-950 ramp with semantic roles? Generate design tokens from #6699CC.
How Blue-gray Looks with Color Vision Deficiency
Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.
#6699CC#9292CC#8395CC#8B8BCD#7E91CC#58A1A1#5E9EB4#959595Using #6699CC in Code
Copy-ready declarations for the places this color usually ends up.
--blue-gray: #6699CC;background-color: #6699CC;colors: { 'blue-gray': '#6699CC' }Color(red: 0.400, green: 0.600, blue: 0.800)<color name="blue_gray">#6699CC</color>fill="#6699CC"More Blue Colors
Blue-gray sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.
#6699CC Frequently Asked Questions
What is the hex code for Blue-gray?
The hex code for Blue-gray is #6699CC. That is rgb(102, 153, 204) in RGB, hsl(210, 50%, 60%) in HSL, and approximately cmyk(50%, 25%, 0%, 20%) in CMYK.
What is the RGB value of #6699CC?
#6699CC is rgb(102, 153, 204) — red 102, green 153, and blue 204 on the 0-255 scale.
What is the CMYK value of #6699CC?
#6699CC converts to approximately cmyk(50%, 25%, 0%, 20%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.
Should text on #6699CC be black or white?
Black text is the more readable choice. #6699CC scores 3:1 against white and 6.99:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.
Can I write #6699CC as a CSS color keyword?
No. #6699CC is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is steelblue (#4682B4) at a CIE76 distance of 9.37, which is clearly related but distinguishable side by side.
Open Blue-gray in a Tool
Keep exploring: every blue in the color library, the guide to shades of blue, or the full color library.