#646374
Closest named color: Slate (#516572). oklch(50.7% 0.027 288.1), rgb(100, 99, 116).
Aa
White text reads best on this color (5.86:1).
About this color
#646374 is a medium-dark close to neutral grey. In OKLCH its lightness is 51%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.028 away. White text reads best on it, at 5.86:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.57:1 |
| White text | 5.86:1 |
Values
| HEX | #646374 |
| RGB | rgb(100, 99, 116) |
| HSL | hsl(244, 8%, 42%) |
| OKLCH | oklch(50.7% 0.027 288.1) |
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 #646374 | 5.86:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #646374 | 3.57:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #646374 text on white | 5.86:1 | AA | Lc 79.4 | Fine for body text |
| #646374 text on black | 3.57:1 | AA large text | Lc -22.4 | 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E9E9EC
oklch(93.5% 0.004 286.3)
-
Step 200
200
#D9D8DE
oklch(88.5% 0.008 293.9)
-
Step 300
300
#C0BFC9
oklch(80.8% 0.014 290.7)
-
Step 400
400
#9F9FAD
oklch(70.7% 0.02 285.9)
-
Step 500
500
#888799
oklch(63% 0.027 288.2)
-
Step 600
600
#727184
oklch(55.6% 0.029 287.8)
-
Step 700
700 (this color)
#646374
oklch(50.7% 0.027 288.1)
-
Step 800
800
#4E4D5B
oklch(42.6% 0.023 288.7)
-
Step 900
900
#41404A
oklch(37.6% 0.017 290.1)
-
Step 950
950
#26262C
oklch(27.1% 0.011 285.6)
#646374 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) | #5F6575 | 0.009 |
| Deuteranopia (no green cones) | #5F6474 | 0.008 |
| Tritanopia (no blue cones) | #616669 | 0.023 |
| Achromatopsia (no color) | #656565 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646374
#646374
oklch(50.7% 0.027 288.1)
- #666755
#666755
oklch(50.8% 0.028 109.9)
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 #646374, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.028
- Dim Gray #696969 ΔE 0.030
- Dusty Grape #545775 ΔE 0.046
- Battleship Gray #6C757D ΔE 0.054
- Metallic Blue #4F738E ΔE 0.056
- YInMn Blue #415A77 ΔE 0.060
- Dusty Purple #825F87 ΔE 0.061
- Muted Purple #805B87 ΔE 0.063
Use #646374 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.