#51573D
Closest named color: Green Brown (#544E03). oklch(44.4% 0.041 118.7), rgb(81, 87, 61).
Aa
White text reads best on this color (7.55:1).
About this color
#51573D is a dark, muted brown. In OKLCH its lightness is 44%, its chroma 0.041 and its hue 119°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Green Brown (#544E03), ΔE 0.055 away. White text reads best on it, at 7.55:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | muted (0.041) |
| Temperature | in between |
| Nearest name | Green Brown (#544E03) |
| Black text | 2.78:1 |
| White text | 7.55:1 |
Values
| HEX | #51573D |
| RGB | rgb(81, 87, 61) |
| HSL | hsl(74, 18%, 29%) |
| OKLCH | oklch(44.4% 0.041 118.7) |
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 #51573D | 7.55:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #51573D | 2.78:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #51573D text on white | 7.55:1 | AAA | Lc 86.3 | Fine for body text |
| #51573D text on black | 2.78:1 | Fails | Lc -15.8 | 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
#F5F6F3
oklch(97.2% 0.004 121.6)
-
Step 100
100
#E9EAE5
oklch(93.5% 0.007 115.7)
-
Step 200
200
#D8DAD1
oklch(88.4% 0.012 116.8)
-
Step 300
300
#BFC3B2
oklch(80.9% 0.024 117.7)
-
Step 400
400
#9EA48A
oklch(70.7% 0.037 117.9)
-
Step 500
500
#868E6C
oklch(63.1% 0.05 118.6)
-
Step 600
600
#707854
oklch(55.6% 0.054 118.4)
-
Step 700
700
#5E6545
oklch(49.2% 0.049 118.3)
-
Step 800
800 (this color)
#51573D
oklch(44.4% 0.041 118.7)
-
Step 900
900
#404431
oklch(37.7% 0.031 117.6)
-
Step 950
950
#25281D
oklch(27% 0.02 120.1)
#51573D 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) | #5A543B | 0.016 |
| Deuteranopia (no green cones) | #5A543E | 0.017 |
| Tritanopia (no blue cones) | #545450 | 0.035 |
| Achromatopsia (no color) | #545454 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51573D
#51573D
oklch(44.4% 0.041 118.7)
- #564F68
#564F68
oklch(44.4% 0.041 297.5)
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 #51573D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Green Brown #544E03 ΔE 0.055
- Pine #2B5D34 ΔE 0.055
- Olive Brown #645403 ΔE 0.056
- Army Green #4B5D16 ΔE 0.056
- Mud Brown #60460F ΔE 0.060
- Camo Green #526525 ΔE 0.061
- Dark Green Blue #1F6357 ΔE 0.062
- Dark Slate Gray #2F4F4F ΔE 0.064
Use #51573D 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.