#645E69
Closest named color: Slate (#516572). oklch(49.1% 0.019 309.9), rgb(100, 94, 105).
Aa
White text reads best on this color (6.27:1).
About this color
#645E69 is a medium-dark close to neutral grey. In OKLCH its lightness is 49%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.032 away. White text reads best on it, at 6.27:1.
| Hue family | Neutrals |
| Lightness | medium-dark (49%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.34:1 |
| White text | 6.27:1 |
Values
| HEX | #645E69 |
| RGB | rgb(100, 94, 105) |
| HSL | hsl(273, 6%, 39%) |
| OKLCH | oklch(49.1% 0.019 309.9) |
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 #645E69 | 6.27:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #645E69 | 3.34:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #645E69 text on white | 6.27:1 | AA | Lc 81.3 | Fine for body text |
| #645E69 text on black | 3.34:1 | AA large text | Lc -20.6 | 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
#EAE9EB
oklch(93.5% 0.003 308.4)
-
Step 200
200
#DAD8DC
oklch(88.5% 0.006 308.4)
-
Step 300
300
#C2BFC5
oklch(80.9% 0.009 308.3)
-
Step 400
400
#A39EA8
oklch(70.7% 0.015 308.2)
-
Step 500
500
#8D8792
oklch(63.2% 0.018 310)
-
Step 600
600
#77707C
oklch(55.6% 0.02 311.4)
-
Step 700
700 (this color)
#645E69
oklch(49.1% 0.019 309.9)
-
Step 800
800
#524D56
oklch(42.8% 0.016 310.3)
-
Step 900
900
#434047
oklch(37.7% 0.012 305.1)
-
Step 950
950
#282529
oklch(26.9% 0.008 317.7)
#645E69 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) | #5D606A | 0.012 |
| Deuteranopia (no green cones) | #5E6069 | 0.011 |
| Tritanopia (no blue cones) | #645F62 | 0.013 |
| Achromatopsia (no color) | #606060 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645E69
#645E69
oklch(49.1% 0.019 309.9)
- #5D6358
#5D6358
oklch(49.1% 0.019 130.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #645E69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.032
- Dim Gray #696969 ΔE 0.035
- Dusty Grape #545775 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.058
- Dusk #4E5481 ΔE 0.066
- Dull Purple #84597E ΔE 0.068
- Battleship Gray #6C757D ΔE 0.069
- Muted Purple #805B87 ΔE 0.071
Use #645E69 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.