#666771
Closest named color: Dim Gray (#696969). oklch(51.6% 0.016 281.3), rgb(102, 103, 113).
Aa
White text reads best on this color (5.60:1).
About this color
#666771 is a medium-dark close to neutral grey. In OKLCH its lightness is 52%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.016 away. White text reads best on it, at 5.60:1.
| Hue family | Neutrals |
| Lightness | medium-dark (52%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #666771 |
| RGB | rgb(102, 103, 113) |
| HSL | hsl(235, 5%, 42%) |
| OKLCH | oklch(51.6% 0.016 281.3) |
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 #666771 | 5.60:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #666771 | 3.74:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #666771 text on white | 5.60:1 | AA | Lc 78.1 | Fine for body text |
| #666771 text on black | 3.74:1 | AA large text | Lc -23.7 | 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
#E9EAEB
oklch(93.7% 0.002 247.8)
-
Step 200
200
#D8D9DC
oklch(88.5% 0.004 271.4)
-
Step 300
300
#BFC0C5
oklch(80.8% 0.007 277.1)
-
Step 400
400
#9FA0A8
oklch(70.7% 0.012 280.4)
-
Step 500
500
#878993
oklch(63.2% 0.015 276.9)
-
Step 600
600
#71727D
oklch(55.5% 0.017 281.7)
-
Step 700
700 (this color)
#666771
oklch(51.6% 0.016 281.3)
-
Step 800
800
#4D4E56
oklch(42.6% 0.013 280.1)
-
Step 900
900
#404147
oklch(37.7% 0.01 278.3)
-
Step 950
950
#26262A
oklch(27% 0.007 285.9)
#666771 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) | #656871 | 0.003 |
| Deuteranopia (no green cones) | #646771 | 0.003 |
| Tritanopia (no blue cones) | #64696A | 0.015 |
| Achromatopsia (no color) | #686868 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666771
#666771
oklch(51.6% 0.016 281.3)
- #6A685E
#6A685E
oklch(51.6% 0.016 97.6)
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 #666771, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.016
- Slate #516572 ΔE 0.032
- Battleship Gray #6C757D ΔE 0.042
- Metallic Blue #4F738E ΔE 0.053
- Dusty Grape #545775 ΔE 0.060
- Battleship Grey #6B7C85 ΔE 0.062
- Grey Purple #826D8C ΔE 0.064
- Dark Taupe #7F684E ΔE 0.064
Use #666771 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.