#646A72

Closest named color: Dim Gray (#696969). oklch(52.2% 0.015 255.6), rgb(100, 106, 114).

White text reads best on this color (5.45:1).

About this color

#646A72 is a medium-dark close to neutral grey. In OKLCH its lightness is 52%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.015 away. White text reads best on it, at 5.45:1.

Hue family	Neutrals
Lightness	medium-dark (52%)
Chroma	close to neutral grey (0.015)
Temperature	neutral
Nearest name	Dim Gray (#696969)
Black text	3.84:1
White text	5.45:1

Values

HEX	#646A72
RGB	rgb(100, 106, 114)
HSL	hsl(214, 7%, 42%)
OKLCH	oklch(52.2% 0.015 255.6)

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 #646A72	5.45:1	AA	Lc -82.6	Fine for body text
Black text on #646A72	3.84:1	AA large text	Lc 26.8	Dividers and decoration only
#646A72 text on white	5.45:1	AA	Lc 77.3	Fine for body text
#646A72 text on black	3.84:1	AA large text	Lc -24.5	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 700.

Step 50
50

#F5F5F6

oklch(97% 0.001 286.4)
Step 100
100

#E9EAEB

oklch(93.7% 0.002 247.8)
Step 200
200

#D7D9DC

oklch(88.5% 0.005 258.3)
Step 300
300

#BEC1C5

oklch(81% 0.007 255.5)
Step 400
400

#9CA1A8

oklch(70.7% 0.012 256.7)
Step 500
500

#848A92

oklch(63.1% 0.014 255.5)
Step 600
600

#6D747D

oklch(55.6% 0.016 254.7)
Step 700
700 (this color)

#646A72

oklch(52.2% 0.015 255.6)
Step 800
800

#4B4F56

oklch(42.7% 0.013 261.8)
Step 900
900

#3E4247

oklch(37.7% 0.01 254)
Step 950
950

#252729

oklch(27.1% 0.005 248)

Export this scale for Tailwind in the Tailwind colors tool

#646A72 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)	#676A72	0.004
Deuteranopia (no green cones)	#666972	0.004
Tritanopia (no blue cones)	#616C6C	0.014
Achromatopsia (no color)	#696969	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 #646A72, closest first.

Similar named colors

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

Use #646A72 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