#51574B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(44.8% 0.021 129), rgb(81, 87, 75).
Aa
White text reads best on this color (7.46:1).
About this color
#51574B is a dark close to neutral grey. In OKLCH its lightness is 45%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.057 away. White text reads best on it, at 7.46:1.
| Hue family | Neutrals |
| Lightness | dark (45%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #51574B |
| RGB | rgb(81, 87, 75) |
| HSL | hsl(90, 7%, 32%) |
| OKLCH | oklch(44.8% 0.021 129) |
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 #51574B | 7.46:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #51574B | 2.81:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #51574B text on white | 7.46:1 | AAA | Lc 86.0 | Fine for body text |
| #51574B text on black | 2.81:1 | Fails | Lc -16.1 | 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 800.
-
Step 50
50
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E9EAE8
oklch(93.6% 0.003 128.5)
-
Step 200
200
#D8DAD5
oklch(88.5% 0.007 124.5)
-
Step 300
300
#BEC2BA
oklch(80.9% 0.012 128.6)
-
Step 400
400
#9DA397
oklch(70.7% 0.018 128.8)
-
Step 500
500
#858D7D
oklch(63.2% 0.025 128.9)
-
Step 600
600
#6E7766
oklch(55.7% 0.028 130.1)
-
Step 700
700
#5C6455
oklch(49.2% 0.025 130.3)
-
Step 800
800 (this color)
#51574B
oklch(44.8% 0.021 129)
-
Step 900
900
#3F433A
oklch(37.6% 0.016 126.8)
-
Step 950
950
#252722
oklch(26.9% 0.01 124.9)
#51574B 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) | #58554A | 0.012 |
| Deuteranopia (no green cones) | #57554B | 0.011 |
| Tritanopia (no blue cones) | #525654 | 0.016 |
| Achromatopsia (no color) | #555555 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51574B
#51574B
oklch(44.8% 0.021 129)
- #58525E
#58525E
oklch(44.9% 0.021 307.9)
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 #51574B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.057
- Dark Green Blue #1F6357 ΔE 0.059
- Slate #516572 ΔE 0.064
- Pine #2B5D34 ΔE 0.069
- Dusty Grape #545775 ΔE 0.070
- YInMn Blue #415A77 ΔE 0.071
- Mud Brown #60460F ΔE 0.074
- Olive Brown #645403 ΔE 0.075
Use #51574B 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.