#646B63
Closest named color: Dim Gray (#696969). oklch(51.9% 0.015 141.8), rgb(100, 107, 99).
Aa
White text reads best on this color (5.49:1).
About this color
#646B63 is a medium-dark close to neutral grey. In OKLCH its lightness is 52%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.015 away. White text reads best on it, at 5.49:1.
| Hue family | Neutrals |
| Lightness | medium-dark (52%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.82:1 |
| White text | 5.49:1 |
Values
| HEX | #646B63 |
| RGB | rgb(100, 107, 99) |
| HSL | hsl(113, 4%, 40%) |
| OKLCH | oklch(51.9% 0.015 141.8) |
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 #646B63 | 5.49:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #646B63 | 3.82:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #646B63 text on white | 5.49:1 | AA | Lc 77.4 | Fine for body text |
| #646B63 text on black | 3.82:1 | AA large text | Lc -24.3 | 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
#F5F5F5
oklch(97% 0 0)
-
Step 100
100
#E9EAE9
oklch(93.6% 0.002 145.6)
-
Step 200
200
#D8DAD7
oklch(88.6% 0.005 134.9)
-
Step 300
300
#BEC2BD
oklch(80.9% 0.008 139.4)
-
Step 400
400
#9DA29C
oklch(70.6% 0.01 140.5)
-
Step 500
500
#858C84
oklch(63.2% 0.014 141.8)
-
Step 600
600
#6E766D
oklch(55.6% 0.017 142.2)
-
Step 700
700 (this color)
#646B63
oklch(51.9% 0.015 141.8)
-
Step 800
800
#4B514A
oklch(42.7% 0.014 141.2)
-
Step 900
900
#3F433E
oklch(37.7% 0.01 139.4)
-
Step 950
950
#252724
oklch(27% 0.006 134.9)
#646B63 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) | #6C6963 | 0.013 |
| Deuteranopia (no green cones) | #6A6963 | 0.010 |
| Tritanopia (no blue cones) | #646A69 | 0.011 |
| Achromatopsia (no color) | #696969 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646B63
#646B63
oklch(51.9% 0.015 141.8)
- #6D666E
#6D666E
oklch(51.9% 0.015 321.9)
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 #646B63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.015
- Slate #516572 ΔE 0.044
- Battleship Gray #6C757D ΔE 0.046
- Dark Taupe #7F684E ΔE 0.048
- Grey Brown #7F7053 ΔE 0.052
- Battleship Grey #6B7C85 ΔE 0.063
- Dark Moss Green #606C38 ΔE 0.063
- Dull Brown #876E4B ΔE 0.065
Use #646B63 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.