#57666E
Closest named color: Slate (#516572). oklch(50.1% 0.022 231.1), rgb(87, 102, 110).
Aa
White text reads best on this color (5.94:1).
About this color
#57666E is a medium-dark close to neutral grey. In OKLCH its lightness is 50%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.011 away. White text reads best on it, at 5.94:1.
| Hue family | Neutrals |
| Lightness | medium-dark (50%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #57666E |
| RGB | rgb(87, 102, 110) |
| HSL | hsl(201, 12%, 39%) |
| OKLCH | oklch(50.1% 0.022 231.1) |
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 #57666E | 5.94:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #57666E | 3.53:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #57666E text on white | 5.94:1 | AA | Lc 79.7 | Fine for body text |
| #57666E text on black | 3.53:1 | AA large text | Lc -22.1 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E8EAEB
oklch(93.6% 0.003 228.8)
-
Step 200
200
#D5DADC
oklch(88.5% 0.006 223.5)
-
Step 300
300
#BAC2C6
oklch(80.9% 0.011 228.9)
-
Step 400
400
#96A3AA
oklch(70.7% 0.018 231)
-
Step 500
500
#7D8C95
oklch(63.1% 0.022 234.1)
-
Step 600
600
#66767F
oklch(55.6% 0.024 232.5)
-
Step 700
700 (this color)
#57666E
oklch(50.1% 0.022 231.1)
-
Step 800
800
#455157
oklch(42.7% 0.018 229.4)
-
Step 900
900
#3A4348
oklch(37.7% 0.015 232.1)
-
Step 950
950
#22272A
oklch(26.9% 0.009 234.1)
#57666E 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) | #62656E | 0.016 |
| Deuteranopia (no green cones) | #5F626E | 0.016 |
| Tritanopia (no blue cones) | #516868 | 0.016 |
| Achromatopsia (no color) | #646464 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57666E
#57666E
oklch(50.1% 0.022 231.1)
- #6E6058
#6E6058
oklch(50% 0.022 51.7)
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 #57666E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.011
- Dim Gray #696969 ΔE 0.030
- Dusty Grape #545775 ΔE 0.051
- Metallic Blue #4F738E ΔE 0.054
- YInMn Blue #415A77 ΔE 0.055
- Battleship Gray #6C757D ΔE 0.057
- Denim #3B638C ΔE 0.061
- Dark Aqua #05696B ΔE 0.068
Use #57666E 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.