#51503F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.7% 0.027 104.7), rgb(81, 80, 63).
Aa
White text reads best on this color (8.17:1).
About this color
#51503F is a dark close to neutral grey. In OKLCH its lightness is 43%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.053 away. White text reads best on it, at 8.17:1.
| Hue family | Neutrals |
| Lightness | dark (43%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #51503F |
| RGB | rgb(81, 80, 63) |
| HSL | hsl(57, 12%, 28%) |
| OKLCH | oklch(42.7% 0.027 104.7) |
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 #51503F | 8.17:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #51503F | 2.56:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #51503F text on white | 8.17:1 | AAA | Lc 88.3 | Fine for body text |
| #51503F text on black | 2.56:1 | Fails | Lc -13.9 | 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
#F5F5F4
oklch(97% 0.001 106.4)
-
Step 100
100
#EAEAE7
oklch(93.6% 0.004 106.5)
-
Step 200
200
#DAD9D3
oklch(88.4% 0.008 98.9)
-
Step 300
300
#C2C1B6
oklch(80.9% 0.015 102.5)
-
Step 400
400
#A3A290
oklch(70.8% 0.025 104.4)
-
Step 500
500
#8C8B75
oklch(63.1% 0.032 105.1)
-
Step 600
600
#76755D
oklch(55.6% 0.036 105.5)
-
Step 700
700
#63624D
oklch(49.1% 0.032 105.3)
-
Step 800
800 (this color)
#51503F
oklch(42.7% 0.027 104.7)
-
Step 900
900
#434236
oklch(37.6% 0.02 103.4)
-
Step 950
950
#27271F
oklch(27% 0.014 107.3)
#51503F 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) | #534F3E | 0.004 |
| Deuteranopia (no green cones) | #545040 | 0.005 |
| Tritanopia (no blue cones) | #544E4B | 0.023 |
| Achromatopsia (no color) | #4F4F4F | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51503F
#51503F
oklch(42.7% 0.027 104.7)
- #4D4D5E
#4D4D5E
oklch(42.7% 0.028 285.2)
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 #51503F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.053
- Mud Brown #60460F ΔE 0.055
- Green Brown #544E03 ΔE 0.061
- Charcoal Grey #3C4142 ΔE 0.063
- Olive Brown #645403 ΔE 0.068
- Pine #2B5D34 ΔE 0.069
- Dark Green Blue #1F6357 ΔE 0.073
- Purple Brown #673A3F ΔE 0.073
Use #51503F 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.