#818C8A

Closest named color: Light Slate Gray (#778899). oklch(63% 0.013 183.9), rgb(129, 140, 138).

Black text reads best on this color (6.05:1).

About this color

#818C8A is a medium-light close to neutral grey. In OKLCH its lightness is 63%, its chroma 0.013. It has too little chroma to lean warm or cool. The nearest named color is Light Slate Gray (#778899), ΔE 0.031 away. Black text reads best on it, at 6.05:1.

Hue family	Neutrals
Lightness	medium-light (63%)
Chroma	close to neutral grey (0.013)
Temperature	neutral
Nearest name	Light Slate Gray (#778899)
Black text	6.05:1
White text	3.47:1

Values

HEX	#818C8A
RGB	rgb(129, 140, 138)
HSL	hsl(169, 5%, 53%)
OKLCH	oklch(63% 0.013 183.9)

Contrast

WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.

Pair	WCAG 2	Result	APCA	APCA guidance
White text on #818C8A	3.47:1	AA large text	Lc -67.7	Content text, not long reading
Black text on #818C8A	6.05:1	AA	Lc 41.8	Non-text elements, placeholder text
#818C8A text on white	3.47:1	AA large text	Lc 62.3	Content text, not long reading
#818C8A text on black	6.05:1	AA	Lc -39.4	Non-text elements, placeholder text

Tints and shades

A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.

Step 50
50

#F5F5F5

oklch(97% 0 0)
Step 100
100

#E8EAEA

oklch(93.6% 0.002 197.1)
Step 200
200

#D7DAD9

oklch(88.6% 0.004 174.5)
Step 300
300

#BCC2C1

oklch(80.9% 0.007 185.2)
Step 400
400

#9AA3A1

oklch(70.8% 0.011 181.3)
Step 500
500 (this color)

#818C8A

oklch(63% 0.013 183.9)
Step 600
600

#6B7674

oklch(55.6% 0.014 183.8)
Step 700
700

#596361

oklch(49% 0.013 182.5)
Step 800
800

#495150

oklch(42.7% 0.01 187.7)
Step 900
900

#3D4342

oklch(37.7% 0.008 184.9)
Step 950
950

#242727

oklch(27% 0.004 196.9)

Export this scale for Tailwind in the Tailwind colors tool

#818C8A with color blindness

Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.

Vision	Seen as	Shift (ΔE)
Protanopia (no red cones)	#8B8B8A	0.014
Deuteranopia (no green cones)	#89898A	0.014
Tritanopia (no blue cones)	#7E8D8B	0.005
Achromatopsia (no color)	#8A8A8A	0.013

Harmonies

Hue rotations in OKLCH that keep this color's lightness and chroma.

This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.

Palettes with this color

Curated palettes that contain a color within ΔE 0.04 (OKLab) of #818C8A, closest first.

Similar named colors

The eight closest entries in our named color list, with their ΔE distance.

Use #818C8A in your product

Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.

Build a color system from this color Generate a palette