#40423D

Closest named color: Charcoal Grey (#3C4142). oklch(37.5% 0.009 124.7), rgb(64, 66, 61).

White text reads best on this color (10.17:1).

About this color

#40423D is a dark close to neutral grey. In OKLCH its lightness is 38%, its chroma 0.009. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.012 away. White text reads best on it, at 10.17:1.

Hue family	Neutrals
Lightness	dark (38%)
Chroma	close to neutral grey (0.009)
Temperature	neutral
Nearest name	Charcoal Grey (#3C4142)
Black text	2.06:1
White text	10.17:1

Values

HEX	#40423D
RGB	rgb(64, 66, 61)
HSL	hsl(84, 4%, 25%)
OKLCH	oklch(37.5% 0.009 124.7)

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 #40423D	10.17:1	AAA	Lc -97.7	Preferred for body text
Black text on #40423D	2.06:1	Fails	Lc 10.3	Not readable
#40423D text on white	10.17:1	AAA	Lc 93.6	Preferred for body text
#40423D text on black	2.06:1	Fails	Lc -8.9	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

#F5F5F5

oklch(97% 0 0)
Step 100
100

#E9EAE9

oklch(93.6% 0.002 145.6)
Step 200
200

#D8D9D7

oklch(88.4% 0.003 128.5)
Step 300
300

#BFC1BD

oklch(80.8% 0.006 128.5)
Step 400
400

#9FA29B

oklch(70.8% 0.011 125.7)
Step 500
500

#878B82

oklch(63.1% 0.014 126.5)
Step 600
600

#71756C

oklch(55.6% 0.014 126.5)
Step 700
700

#5F625A

oklch(49.1% 0.013 123.7)
Step 800
800

#4D5049

oklch(42.6% 0.012 125.9)
Step 900
900 (this color)

#40423D

oklch(37.5% 0.009 124.7)
Step 950
950

#262724

oklch(27.1% 0.006 121.8)

Export this scale for Tailwind in the Tailwind colors tool

#40423D 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)	#43413D	0.006
Deuteranopia (no green cones)	#42413D	0.004
Tritanopia (no blue cones)	#404141	0.009
Achromatopsia (no color)	#414141	0.009

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 #40423D, closest first.

Similar named colors

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

Use #40423D 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