#51544B

Closest named color: Dark Slate Gray (#2F4F4F). oklch(44% 0.015 122), rgb(81, 84, 75).

White text reads best on this color (7.72:1).

About this color

#51544B is a dark close to neutral grey. In OKLCH its lightness is 44%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.052 away. White text reads best on it, at 7.72:1.

Hue family	Neutrals
Lightness	dark (44%)
Chroma	close to neutral grey (0.015)
Temperature	neutral
Nearest name	Dark Slate Gray (#2F4F4F)
Black text	2.71:1
White text	7.72:1

Values

HEX	#51544B
RGB	rgb(81, 84, 75)
HSL	hsl(80, 6%, 31%)
OKLCH	oklch(44% 0.015 122)

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 #51544B	7.72:1	AAA	Lc -91.6	Preferred for body text
Black text on #51544B	2.71:1	Fails	Lc 17.2	Dividers and decoration only
#51544B text on white	7.72:1	AAA	Lc 86.8	Fine for body text
#51544B text on black	2.71:1	Fails	Lc -15.3	Dividers and decoration only

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 800.

Step 50
50

#F5F5F5

oklch(97% 0 0)
Step 100
100

#E9EAE8

oklch(93.6% 0.003 128.5)
Step 200
200

#D8DAD6

oklch(88.6% 0.006 128.5)
Step 300
300

#BFC1BB

oklch(80.8% 0.009 121.7)
Step 400
400

#9FA299

oklch(70.7% 0.013 121.8)
Step 500
500

#878B80

oklch(63% 0.017 123.2)
Step 600
600

#717569

oklch(55.5% 0.019 122)
Step 700
700

#5F6257

oklch(49% 0.018 119.5)
Step 800
800 (this color)

#51544B

oklch(44% 0.015 122)
Step 900
900

#40433C

oklch(37.8% 0.012 126)
Step 950
950

#262723

oklch(27% 0.007 118.3)

Export this scale for Tailwind in the Tailwind colors tool

#51544B 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)	#55534B	0.007
Deuteranopia (no green cones)	#55534B	0.007
Tritanopia (no blue cones)	#525351	0.011
Achromatopsia (no color)	#535353	0.015

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 #51544B, closest first.

Similar named colors

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

Use #51544B 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