#4B5B57
Closest named color: Slate (#516572). oklch(45.6% 0.021 178.5), rgb(75, 91, 87).
Aa
White text reads best on this color (7.15:1).
About this color
#4B5B57 is a medium-dark close to neutral grey. In OKLCH its lightness is 46%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.048 away. White text reads best on it, at 7.15:1.
| Hue family | Neutrals |
| Lightness | medium-dark (46%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 2.93:1 |
| White text | 7.15:1 |
Values
| HEX | #4B5B57 |
| RGB | rgb(75, 91, 87) |
| HSL | hsl(165, 10%, 33%) |
| OKLCH | oklch(45.6% 0.021 178.5) |
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 #4B5B57 | 7.15:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #4B5B57 | 2.93:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #4B5B57 text on white | 7.15:1 | AAA | Lc 84.9 | Fine for body text |
| #4B5B57 text on black | 2.93:1 | Fails | Lc -17.2 | 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 800.
-
Step 50
50
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBEA
oklch(93.7% 0.004 179.7)
-
Step 200
200
#D5DBD9
oklch(88.6% 0.007 174.4)
-
Step 300
300
#B9C3C0
oklch(80.9% 0.012 176.2)
-
Step 400
400
#94A5A1
oklch(70.7% 0.02 180)
-
Step 500
500
#7A8F89
oklch(63.2% 0.026 176.3)
-
Step 600
600
#637973
oklch(55.7% 0.027 176.9)
-
Step 700
700
#526661
oklch(49.2% 0.025 178.3)
-
Step 800
800 (this color)
#4B5B57
oklch(45.6% 0.021 178.5)
-
Step 900
900
#394542
oklch(37.9% 0.016 178.6)
-
Step 950
950
#212826
oklch(26.9% 0.011 176.4)
#4B5B57 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) | #5A5957 | 0.023 |
| Deuteranopia (no green cones) | #565757 | 0.020 |
| Tritanopia (no blue cones) | #475C5A | 0.007 |
| Achromatopsia (no color) | #585858 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B5B57
#4B5B57
oklch(45.6% 0.021 178.5)
- #615257
#615257
oklch(45.5% 0.021 355.9)
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 #4B5B57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.048
- Dark Green Blue #1F6357 ΔE 0.049
- YInMn Blue #415A77 ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.057
- Dusty Grape #545775 ΔE 0.057
- Petrol #005F6A ΔE 0.061
- Dark Aqua #05696B ΔE 0.062
- Dim Gray #696969 ΔE 0.068
Use #4B5B57 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.