#645957
Closest named color: Dim Gray (#696969). oklch(47.4% 0.015 30), rgb(100, 89, 87).
Aa
White text reads best on this color (6.75:1).
About this color
#645957 is a medium-dark close to neutral grey. In OKLCH its lightness is 47%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.049 away. White text reads best on it, at 6.75:1.
| Hue family | Neutrals |
| Lightness | medium-dark (47%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.10:1 |
| White text | 6.75:1 |
Values
| HEX | #645957 |
| RGB | rgb(100, 89, 87) |
| HSL | hsl(9, 7%, 37%) |
| OKLCH | oklch(47.4% 0.015 30) |
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 #645957 | 6.75:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #645957 | 3.10:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #645957 text on white | 6.75:1 | AA | Lc 83.3 | Fine for body text |
| #645957 text on black | 3.10:1 | AA large text | Lc -18.6 | 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
#F6F5F5
oklch(97.1% 0.001 17.2)
-
Step 100
100
#EBE9E9
oklch(93.6% 0.002 17.2)
-
Step 200
200
#DCD8D7
oklch(88.5% 0.005 34.3)
-
Step 300
300
#C5BFBE
oklch(80.9% 0.007 28.8)
-
Step 400
400
#A89E9C
oklch(70.7% 0.012 31.1)
-
Step 500
500
#928684
oklch(63% 0.015 28.9)
-
Step 600
600
#7C706E
oklch(55.6% 0.015 28.9)
-
Step 700
700 (this color)
#645957
oklch(47.4% 0.015 30)
-
Step 800
800
#554D4B
oklch(42.7% 0.011 34.3)
-
Step 900
900
#46403F
oklch(37.7% 0.008 28.9)
-
Step 950
950
#292525
oklch(26.9% 0.006 17.5)
#645957 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) | #5B5A57 | 0.015 |
| Deuteranopia (no green cones) | #5E5C57 | 0.013 |
| Tritanopia (no blue cones) | #675858 | 0.006 |
| Achromatopsia (no color) | #5B5B5B | 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 #645957, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.049
- Slate #516572 ΔE 0.050
- Dusty Grape #545775 ΔE 0.056
- Brownish Purple #76424E ΔE 0.067
- YInMn Blue #415A77 ΔE 0.069
- Dark Taupe #7F684E ΔE 0.070
- Cocoa #875F42 ΔE 0.072
- Dark Mauve #874C62 ΔE 0.075
Use #645957 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.