#646371
Closest named color: Dim Gray (#696969). oklch(50.6% 0.022 288.9), rgb(100, 99, 113).
Aa
White text reads best on this color (5.89:1).
About this color
#646371 is a medium-dark close to neutral grey. In OKLCH its lightness is 51%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.027 away. White text reads best on it, at 5.89:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.56:1 |
| White text | 5.89:1 |
Values
| HEX | #646371 |
| RGB | rgb(100, 99, 113) |
| HSL | hsl(244, 7%, 42%) |
| OKLCH | oklch(50.6% 0.022 288.9) |
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 #646371 | 5.89:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #646371 | 3.56:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #646371 text on white | 5.89:1 | AA | Lc 79.5 | Fine for body text |
| #646371 text on black | 3.56:1 | AA large text | Lc -22.3 | 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
#D9D8DD
oklch(88.4% 0.007 295.4)
-
Step 300
300
#C0C0C7
oklch(81% 0.01 286.2)
-
Step 400
400
#A09FAB
oklch(70.7% 0.017 289.8)
-
Step 500
500
#898896
oklch(63.2% 0.021 289.1)
-
Step 600
600
#727181
oklch(55.5% 0.025 288.4)
-
Step 700
700 (this color)
#646371
oklch(50.6% 0.022 288.9)
-
Step 800
800
#4E4E59
oklch(42.8% 0.018 285.6)
-
Step 900
900
#414049
oklch(37.6% 0.015 290.7)
-
Step 950
950
#26262B
oklch(27.1% 0.009 285.8)
#646371 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) | #606572 | 0.008 |
| Deuteranopia (no green cones) | #606471 | 0.006 |
| Tritanopia (no blue cones) | #626568 | 0.018 |
| Achromatopsia (no color) | #646464 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646371
#646371
oklch(50.6% 0.022 288.9)
- #666658
#666658
oklch(50.6% 0.021 107.1)
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 #646371, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.027
- Slate #516572 ΔE 0.027
- Dusty Grape #545775 ΔE 0.048
- Battleship Gray #6C757D ΔE 0.054
- Metallic Blue #4F738E ΔE 0.058
- YInMn Blue #415A77 ΔE 0.061
- Dusty Purple #825F87 ΔE 0.064
- Dull Purple #84597E ΔE 0.065
Use #646371 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.