#645E64
Closest named color: Dim Gray (#696969). oklch(49% 0.012 325.8), rgb(100, 94, 100).
Aa
White text reads best on this color (6.31:1).
About this color
#645E64 is a medium-dark close to neutral grey. In OKLCH its lightness is 49%, its chroma 0.012. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.033 away. White text reads best on it, at 6.31:1.
| Hue family | Neutrals |
| Lightness | medium-dark (49%) |
| Chroma | close to neutral grey (0.012) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.32:1 |
| White text | 6.31:1 |
Values
| HEX | #645E64 |
| RGB | rgb(100, 94, 100) |
| HSL | hsl(300, 3%, 38%) |
| OKLCH | oklch(49% 0.012 325.8) |
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 #645E64 | 6.31:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #645E64 | 3.32:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #645E64 text on white | 6.31:1 | AA | Lc 81.4 | Fine for body text |
| #645E64 text on black | 3.32:1 | AA large text | Lc -20.4 | 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
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#EAE9EA
oklch(93.5% 0.002 325.6)
-
Step 200
200
#DAD8DA
oklch(88.4% 0.003 325.6)
-
Step 300
300
#C3BFC3
oklch(80.9% 0.007 325.6)
-
Step 400
400
#A49FA4
oklch(70.8% 0.009 325.7)
-
Step 500
500
#8D878D
oklch(63.1% 0.011 325.7)
-
Step 600
600
#777177
oklch(55.6% 0.012 325.7)
-
Step 700
700 (this color)
#645E64
oklch(49% 0.012 325.8)
-
Step 800
800
#524D52
oklch(42.7% 0.01 325.8)
-
Step 900
900
#444044
oklch(37.7% 0.009 325.7)
-
Step 950
950
#282628
oklch(27.2% 0.005 325.7)
#645E64 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) | #5E5F64 | 0.010 |
| Deuteranopia (no green cones) | #5F6064 | 0.009 |
| Tritanopia (no blue cones) | #645E60 | 0.006 |
| Achromatopsia (no color) | #606060 | 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 #645E64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.033
- Slate #516572 ΔE 0.034
- Dusty Grape #545775 ΔE 0.047
- YInMn Blue #415A77 ΔE 0.062
- Dark Taupe #7F684E ΔE 0.068
- Battleship Gray #6C757D ΔE 0.071
- Dusk #4E5481 ΔE 0.072
- Dull Purple #84597E ΔE 0.073
Use #645E64 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.