BLUE

Blue Gray

#6699CC

Conversions

HEX#6699CC

RGBrgb(102, 153, 204)

HSLhsl(210, 50%, 60%)

HSVhsv(210, 50%, 80%)

CMYKcmyk(50%, 25%, 0%, 20%)

Copy CSS

color: #6699cc;
/* rgb  */ color: rgb(102, 153, 204);
/* hsl  */ color: hsl(210, 50%, 60%);

Contrast

On whiteFail · 3.00 : 1

On ink blackPass · 6.37 : 1

Shades

Tints

Pairings

About Blue Gray

Blue Gray is the hex color #6699CC, which translates to rgb(102, 153, 204) in RGB and hsl(210, 50%, 60%) in HSL. On the color wheel it sits at 210 degrees, with a saturation of 50 percent and a lightness of 60 percent. That combination puts Blue Gray in the workable middle of the blue family, neither pastel nor fully saturated.

How Blue Gray compares

The closest standard CSS keyword is steelblue (#4682B4), a CIE76 distance of 9.3 away in CIELAB. That is a visible difference, so the keyword is not a substitute here. In the Tailwind CSS 4.3.1 palette the nearest token is blue-300 (#8EC5FF), at a distance of 16.4. Inside this library the closest neighbour is Carolina Blue at 6.4. Sorted by lightness, Blue Gray is number 23 of the 30 blue colors here.

Text on Blue Gray

One of the five common text colors below clears WCAG AA for normal text on Blue Gray, led by Ink black at 6.37:1. The ratios are computed with the WCAG relative luminance formula, the same one the contrast checker uses, which opens with Blue Gray already loaded as the background.

Contrast of common text colors on Blue Gray. AA normal text needs 4.5:1, AA large text and non-text elements need 3:1, AAA normal text needs 7:1.
Text color	Ratio	AA normal	AA large	AAA normal
White #FFFFFF	3.00:1	Fail	Pass	Fail
Ink black #0F0F12	6.37:1	Pass	Pass	Fail
Mid grey #6B7280	1.61:1	Fail	Fail	Fail
Dark grey #374151	3.43:1	Fail	Pass	Fail
Light grey #E5E7EB	2.43:1	Fail	Fail	Fail

Building a palette around Blue Gray

The pairings above give you three classic starting points. The complementary color sits opposite on the wheel and works well as an accent that draws the eye. The analogous colors sit right beside Blue Gray for calmer, harmonious combinations. The triadic pair spaces three hues evenly for a balanced, energetic palette. Open any swatch to explore it as its own color.

Full values for Blue Gray

Format	Value
HEX	#6699CC
RGB	rgb(102, 153, 204)
HSL	hsl(210, 50%, 60%)
HSV	hsv(210, 50%, 80%)
CMYK	cmyk(50%, 25%, 0%, 20%)
OKLCH	oklch(66.76% 0.0939 249.39)
CIELAB	lab(61.62 -2.82 -31.43)

Use Blue Gray in a tool

Nearby colors

Last updated 5 August 2026 by FusionStudios. Every value on this page is computed by the same functions the tools use. How this is calculated.