#404148

Closest named color: Charcoal Grey (#3C4142). oklch(37.7% 0.012 279.3), rgb(64, 65, 72).

White text reads best on this color (10.15:1).

About this color

#404148 is a dark close to neutral grey. In OKLCH its lightness is 38%, its chroma 0.012. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.013 away. White text reads best on it, at 10.15:1.

Hue family	Neutrals
Lightness	dark (38%)
Chroma	close to neutral grey (0.012)
Temperature	neutral
Nearest name	Charcoal Grey (#3C4142)
Black text	2.06:1
White text	10.15:1

Values

HEX	#404148
RGB	rgb(64, 65, 72)
HSL	hsl(233, 6%, 27%)
OKLCH	oklch(37.7% 0.012 279.3)

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 #404148	10.15:1	AAA	Lc -97.7	Preferred for body text
Black text on #404148	2.06:1	Fails	Lc 10.3	Not readable
#404148 text on white	10.15:1	AAA	Lc 93.6	Preferred for body text
#404148 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

#F5F5F6

oklch(97% 0.001 286.4)
Step 100
100

#E9EAEB

oklch(93.7% 0.002 247.8)
Step 200
200

#D8D9DC

oklch(88.5% 0.004 271.4)
Step 300
300

#BFC0C6

oklch(80.9% 0.008 278.6)
Step 400
400

#9EA0AA

oklch(70.7% 0.015 277)
Step 500
500

#878995

oklch(63.2% 0.018 278.3)
Step 600
600

#70727F

oklch(55.5% 0.02 278.8)
Step 700
700

#5E606B

oklch(49.1% 0.018 277.5)
Step 800
800

#4D4E58

oklch(42.7% 0.016 281.1)
Step 900
900 (this color)

#404148

oklch(37.7% 0.012 279.3)
Step 950
950

#25262A

oklch(26.9% 0.008 274.7)

Export this scale for Tailwind in the Tailwind colors tool

#404148 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)	#3F4248	0.003
Deuteranopia (no green cones)	#3F4148	0.002
Tritanopia (no blue cones)	#3E4243	0.011
Achromatopsia (no color)	#414141	0.012

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 #404148, closest first.

Similar named colors

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

Use #404148 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