#3F3533

Closest named color: Onyx (#343A40). oklch(33.9% 0.015 31.2), rgb(63, 53, 51).

White text reads best on this color (11.87:1).

About this color

#3F3533 is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.027 away. White text reads best on it, at 11.87:1.

Hue family	Neutrals
Lightness	dark (34%)
Chroma	close to neutral grey (0.015)
Temperature	neutral
Nearest name	Onyx (#343A40)
Black text	1.76:1
White text	11.87:1

Values

HEX	#3F3533
RGB	rgb(63, 53, 51)
HSL	hsl(10, 11%, 22%)
OKLCH	oklch(33.9% 0.015 31.2)

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 #3F3533	11.87:1	AAA	Lc -100.8	Preferred for body text
Black text on #3F3533	1.76:1	Fails	Lc 0.0	Not readable
#3F3533 text on white	11.87:1	AAA	Lc 97.2	Preferred for body text
#3F3533 text on black	1.76:1	Fails	Lc 0.0	Not readable

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 900.

Step 50
50

#F6F5F5

oklch(97.1% 0.001 17.2)
Step 100
100

#ECE9E8

oklch(93.6% 0.004 39.5)
Step 200
200

#DDD8D7

oklch(88.6% 0.006 31.1)
Step 300
300

#C8BEBC

oklch(80.9% 0.012 31.1)
Step 400
400

#AB9D9A

oklch(70.7% 0.017 32)
Step 500
500

#978581

oklch(63.2% 0.023 32.6)
Step 600
600

#816E6B

oklch(55.5% 0.025 28.5)
Step 700
700

#6D5C59

oklch(49% 0.023 29.7)
Step 800
800

#594B49

oklch(42.6% 0.019 27.5)
Step 900
900 (this color)

#3F3533

oklch(33.9% 0.015 31.2)
Step 950
950

#2B2524

oklch(27.1% 0.009 29)

Export this scale for Tailwind in the Tailwind colors tool

#3F3533 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)	#373633	0.014
Deuteranopia (no green cones)	#393833	0.014
Tritanopia (no blue cones)	#423434	0.007
Achromatopsia (no color)	#373737	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 #3F3533, closest first.

Similar named colors

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

Use #3F3533 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