#57636B
Closest named color: Slate (#516572). oklch(49.2% 0.02 237), rgb(87, 99, 107).
Aa
White text reads best on this color (6.17:1).
About this color
#57636B is a medium-dark close to neutral grey. In OKLCH its lightness is 49%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.013 away. White text reads best on it, at 6.17:1.
| Hue family | Neutrals |
| Lightness | medium-dark (49%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.40:1 |
| White text | 6.17:1 |
Values
| HEX | #57636B |
| RGB | rgb(87, 99, 107) |
| HSL | hsl(204, 10%, 38%) |
| OKLCH | oklch(49.2% 0.02 237) |
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 #57636B | 6.17:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #57636B | 3.40:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #57636B text on white | 6.17:1 | AA | Lc 80.8 | Fine for body text |
| #57636B text on black | 3.40:1 | AA large text | Lc -21.0 | 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
#E8EAEB
oklch(93.6% 0.003 228.8)
-
Step 200
200
#D6DADC
oklch(88.6% 0.005 228.8)
-
Step 300
300
#BBC2C6
oklch(81% 0.01 232.4)
-
Step 400
400
#98A2A9
oklch(70.6% 0.015 238.1)
-
Step 500
500
#7F8B94
oklch(63% 0.019 240.2)
-
Step 600
600
#68757E
oklch(55.5% 0.021 238.1)
-
Step 700
700 (this color)
#57636B
oklch(49.2% 0.02 237)
-
Step 800
800
#475157
oklch(42.8% 0.016 234.1)
-
Step 900
900
#3C4348
oklch(37.8% 0.013 238.9)
-
Step 950
950
#23272A
oklch(27% 0.008 240.2)
#57636B 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) | #60636B | 0.013 |
| Deuteranopia (no green cones) | #5D606B | 0.012 |
| Tritanopia (no blue cones) | #526565 | 0.015 |
| Achromatopsia (no color) | #616161 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57636B
#57636B
oklch(49.2% 0.02 237)
- #6A5F56
#6A5F56
oklch(49.3% 0.02 61.6)
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 #57636B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.013
- Dim Gray #696969 ΔE 0.035
- Dusty Grape #545775 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.050
- Metallic Blue #4F738E ΔE 0.061
- Denim #3B638C ΔE 0.062
- Battleship Gray #6C757D ΔE 0.065
- Dusk #4E5481 ΔE 0.068
Use #57636B 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.