#646173
Closest named color: Slate (#516572). oklch(50.2% 0.029 293), rgb(100, 97, 115).
Aa
White text reads best on this color (6.00:1).
About this color
#646173 is a medium-dark close to neutral grey. In OKLCH its lightness is 50%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.029 away. White text reads best on it, at 6.00:1.
| Hue family | Neutrals |
| Lightness | medium-dark (50%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.49:1 |
| White text | 6.00:1 |
Values
| HEX | #646173 |
| RGB | rgb(100, 97, 115) |
| HSL | hsl(250, 8%, 42%) |
| OKLCH | oklch(50.2% 0.029 293) |
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 #646173 | 6.00:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #646173 | 3.49:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #646173 text on white | 6.00:1 | AA | Lc 80.0 | Fine for body text |
| #646173 text on black | 3.49:1 | AA large text | Lc -21.8 | 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
#EAE9EC
oklch(93.6% 0.004 301.4)
-
Step 200
200
#D9D8DE
oklch(88.5% 0.008 293.9)
-
Step 300
300
#C1BFC9
oklch(80.9% 0.014 295.3)
-
Step 400
400
#A19EAE
oklch(70.7% 0.023 294.4)
-
Step 500
500
#8A8799
oklch(63.2% 0.027 293.3)
-
Step 600
600
#747084
oklch(55.6% 0.031 294.5)
-
Step 700
700 (this color)
#646173
oklch(50.2% 0.029 293)
-
Step 800
800
#4F4D5B
oklch(42.7% 0.023 291.9)
-
Step 900
900
#42404B
oklch(37.8% 0.019 293.8)
-
Step 950
950
#26252C
oklch(26.8% 0.013 292.1)
#646173 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) | #5D6374 | 0.011 |
| Deuteranopia (no green cones) | #5D6372 | 0.012 |
| Tritanopia (no blue cones) | #616467 | 0.025 |
| Achromatopsia (no color) | #636363 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646173
#646173
oklch(50.2% 0.029 293)
- #646653
#646653
oklch(50.3% 0.029 112.3)
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 #646173, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.029
- Dim Gray #696969 ΔE 0.034
- Dusty Grape #545775 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.058
- Battleship Gray #6C757D ΔE 0.060
- Metallic Blue #4F738E ΔE 0.060
- Dusty Purple #825F87 ΔE 0.061
- Dull Purple #84597E ΔE 0.062
Use #646173 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.