#646376
Closest named color: Slate (#516572). oklch(50.8% 0.03 287.7), rgb(100, 99, 118).
Aa
White text reads best on this color (5.85:1).
About this color
#646376 is a medium-dark close to neutral grey. In OKLCH its lightness is 51%, its chroma 0.030. 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 5.85:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #646376 |
| RGB | rgb(100, 99, 118) |
| HSL | hsl(243, 9%, 43%) |
| OKLCH | oklch(50.8% 0.03 287.7) |
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 #646376 | 5.85:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #646376 | 3.58:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #646376 text on white | 5.85:1 | AA | Lc 79.3 | Fine for body text |
| #646376 text on black | 3.58:1 | AA large text | Lc -22.5 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9EC
oklch(93.5% 0.004 286.3)
-
Step 200
200
#D8D8DE
oklch(88.4% 0.008 286.2)
-
Step 300
300
#C0BFCA
oklch(80.9% 0.015 290.2)
-
Step 400
400
#9F9FAF
oklch(70.8% 0.023 285.8)
-
Step 500
500
#88879B
oklch(63.1% 0.03 287.8)
-
Step 600
600
#727186
oklch(55.7% 0.032 287.5)
-
Step 700
700 (this color)
#646376
oklch(50.8% 0.03 287.7)
-
Step 800
800
#4E4D5C
oklch(42.7% 0.025 288.4)
-
Step 900
900
#41404C
oklch(37.7% 0.02 289.2)
-
Step 950
950
#26262C
oklch(27.1% 0.011 285.6)
#646376 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) | #5F6577 | 0.009 |
| Deuteranopia (no green cones) | #5E6475 | 0.010 |
| Tritanopia (no blue cones) | #606669 | 0.026 |
| Achromatopsia (no color) | #656565 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646376
#646376
oklch(50.8% 0.03 287.7)
- #676753
#676753
oklch(50.8% 0.03 107.4)
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 #646376, 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 0.033
- Dusty Grape #545775 ΔE 0.046
- Metallic Blue #4F738E ΔE 0.054
- Battleship Gray #6C757D ΔE 0.054
- Dusty Purple #825F87 ΔE 0.059
- YInMn Blue #415A77 ΔE 0.060
- Muted Purple #805B87 ΔE 0.061
Use #646376 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.