#51491B
Closest named color: Green Brown (#544E03). oklch(40.3% 0.065 99.5), rgb(81, 73, 27).
Aa
White text reads best on this color (9.05:1).
About this color
#51491B is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.065 and its hue 99°. Its hue sits on the warm side of the wheel. The nearest named color is Green Brown (#544E03), ΔE 0.026 away. White text reads best on it, at 9.05:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Green Brown (#544E03) |
| Black text | 2.31:1 |
| White text | 9.05:1 |
Values
| HEX | #51491B |
| RGB | rgb(81, 73, 27) |
| HSL | hsl(51, 50%, 21%) |
| OKLCH | oklch(40.3% 0.065 99.5) |
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 #51491B | 9.05:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #51491B | 2.31:1 | Fails | Lc 13.2 | Not readable |
| #51491B text on white | 9.05:1 | AAA | Lc 90.8 | Preferred for body text |
| #51491B text on black | 2.31:1 | Fails | Lc -11.6 | 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
#F6F5F2
oklch(97% 0.004 91.4)
-
Step 100
100
#EBEAE2
oklch(93.6% 0.011 100.8)
-
Step 200
200
#DCDACA
oklch(88.6% 0.022 101)
-
Step 300
300
#C6C2A6
oklch(81% 0.038 100.5)
-
Step 400
400
#A9A276
oklch(70.7% 0.061 100.1)
-
Step 500
500
#958B51
oklch(63.2% 0.079 99.7)
-
Step 600
600
#7F7435
oklch(55.5% 0.085 99.5)
-
Step 700
700
#6C6127
oklch(49% 0.079 98.6)
-
Step 800
800 (this color)
#51491B
oklch(40.3% 0.065 99.5)
-
Step 900
900
#484221
oklch(37.7% 0.051 99.2)
-
Step 950
950
#2A2714
oklch(27% 0.032 100.4)
#51491B 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) | #504716 | 0.007 |
| Deuteranopia (no green cones) | #524A1D | 0.004 |
| Tritanopia (no blue cones) | #57443F | 0.059 |
| Achromatopsia (no color) | #494949 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51491B
#51491B
oklch(40.3% 0.065 99.5)
- #41446B
#41446B
oklch(40.2% 0.066 279.6)
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 #51491B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Green Brown #544E03 ΔE 0.026
- Mud Brown #60460F ΔE 0.027
- Olive Brown #645403 ΔE 0.053
- Navy Green #35530A ΔE 0.057
- Dark Olive #373E02 ΔE 0.063
- Army Green #4B5D16 ΔE 0.064
- Pine #2B5D34 ΔE 0.071
- Charcoal Grey #3C4142 ΔE 0.075
Use #51491B 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.