#504B40
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.4% 0.019 86.5), rgb(80, 75, 64).
Aa
White text reads best on this color (8.67:1).
About this color
#504B40 is a dark close to neutral grey. In OKLCH its lightness is 41%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.049 away. White text reads best on it, at 8.67:1.
| Hue family | Neutrals |
| Lightness | dark (41%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.42:1 |
| White text | 8.67:1 |
Values
| HEX | #504B40 |
| RGB | rgb(80, 75, 64) |
| HSL | hsl(41, 11%, 28%) |
| OKLCH | oklch(41.4% 0.019 86.5) |
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 #504B40 | 8.67:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #504B40 | 2.42:1 | Fails | Lc 14.2 | Not readable |
| #504B40 text on white | 8.67:1 | AAA | Lc 89.8 | Fine for body text |
| #504B40 text on black | 2.42:1 | Fails | Lc -12.5 | Not readable |
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
#F6F5F4
oklch(97.1% 0.002 67.8)
-
Step 100
100
#EBEAE7
oklch(93.7% 0.004 91.4)
-
Step 200
200
#DBD9D5
oklch(88.6% 0.006 84.6)
-
Step 300
300
#C4C0B9
oklch(80.9% 0.011 81.8)
-
Step 400
400
#A5A094
oklch(70.6% 0.018 88)
-
Step 500
500
#8F897A
oklch(63.1% 0.023 88.8)
-
Step 600
600
#7A7363
oklch(55.7% 0.025 87.2)
-
Step 700
700
#666052
oklch(49% 0.023 87.6)
-
Step 800
800 (this color)
#504B40
oklch(41.4% 0.019 86.5)
-
Step 900
900
#454139
oklch(37.7% 0.014 84.6)
-
Step 950
950
#282621
oklch(26.9% 0.009 88.8)
#504B40 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) | #4E4B3F | 0.004 |
| Deuteranopia (no green cones) | #4F4C40 | 0.003 |
| Tritanopia (no blue cones) | #534948 | 0.017 |
| Achromatopsia (no color) | #4B4B4B | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #504B40
#504B40
oklch(41.4% 0.019 86.5)
- #474B56
#474B56
oklch(41.3% 0.019 269.7)
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 #504B40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.049
- Mud Brown #60460F ΔE 0.058
- Purple Brown #673A3F ΔE 0.062
- Green Brown #544E03 ΔE 0.069
- Charcoal #264653 ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.076
- Onyx #343A40 ΔE 0.076
Use #504B40 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.