#646C73
Closest named color: Dim Gray (#696969). oklch(52.7% 0.015 244.4), rgb(100, 108, 115).
Aa
White text reads best on this color (5.33:1).
About this color
#646C73 is a medium-dark close to neutral grey. In OKLCH its lightness is 53%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.016 away. White text reads best on it, at 5.33:1.
| Hue family | Neutrals |
| Lightness | medium-dark (53%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #646C73 |
| RGB | rgb(100, 108, 115) |
| HSL | hsl(208, 7%, 42%) |
| OKLCH | oklch(52.7% 0.015 244.4) |
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 #646C73 | 5.33:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #646C73 | 3.93:1 | AA large text | Lc 27.5 | Dividers and decoration only |
| #646C73 text on white | 5.33:1 | AA | Lc 76.6 | Fine for body text |
| #646C73 text on black | 3.93:1 | AA large text | Lc -25.2 | 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 600.
-
Step 50
50
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E9EAEB
oklch(93.7% 0.002 247.8)
-
Step 200
200
#D7D9DB
oklch(88.4% 0.004 247.9)
-
Step 300
300
#BDC1C5
oklch(80.9% 0.007 247.9)
-
Step 400
400
#9BA1A7
oklch(70.6% 0.011 248)
-
Step 500
500
#838B91
oklch(63.2% 0.013 240)
-
Step 600
600 (this color)
#646C73
oklch(52.7% 0.015 244.4)
-
Step 700
700
#5A6268
oklch(49.1% 0.014 240.1)
-
Step 800
800
#4A5055
oklch(42.8% 0.011 243.1)
-
Step 900
900
#3E4246
oklch(37.7% 0.009 248.1)
-
Step 950
950
#242729
oklch(27% 0.006 236.7)
#646C73 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) | #696C73 | 0.007 |
| Deuteranopia (no green cones) | #676A73 | 0.007 |
| Tritanopia (no blue cones) | #606E6E | 0.013 |
| Achromatopsia (no color) | #6B6B6B | 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 #646C73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.016
- Battleship Gray #6C757D ΔE 0.031
- Slate #516572 ΔE 0.036
- Metallic Blue #4F738E ΔE 0.046
- Battleship Grey #6B7C85 ΔE 0.050
- Grey Blue #647D8E ΔE 0.055
- Purple Grey #866F85 ΔE 0.062
- Dark Taupe #7F684E ΔE 0.063
Use #646C73 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.