#666576
Closest named color: Dim Gray (#696969). oklch(51.4% 0.027 288.1), rgb(102, 101, 118).
Aa
White text reads best on this color (5.69:1).
About this color
#666576 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 Dim Gray (#696969), ΔE 0.028 away. White text reads best on it, at 5.69:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #666576 |
| RGB | rgb(102, 101, 118) |
| HSL | hsl(244, 8%, 43%) |
| OKLCH | oklch(51.4% 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 #666576 | 5.69:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #666576 | 3.68:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #666576 text on white | 5.69:1 | AA | Lc 78.5 | Fine for body text |
| #666576 text on black | 3.68:1 | AA large text | Lc -23.3 | 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
#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
#A09FAD
oklch(70.8% 0.02 289.2)
-
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)
#666576
oklch(51.4% 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)
#666576 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) | #616777 | 0.009 |
| Deuteranopia (no green cones) | #616676 | 0.008 |
| Tritanopia (no blue cones) | #63686B | 0.023 |
| Achromatopsia (no color) | #676767 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666576
#666576
oklch(51.4% 0.027 288.1)
- #686957
#686957
oklch(51.5% 0.027 109.9)
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 #666576, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.028
- Slate #516572 ΔE 0.032
- Battleship Gray #6C757D ΔE 0.048
- Metallic Blue #4F738E ΔE 0.052
- Dusty Grape #545775 ΔE 0.053
- Dusty Purple #825F87 ΔE 0.058
- Grey Purple #826D8C ΔE 0.061
- Muted Purple #805B87 ΔE 0.061
Use #666576 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.