#51820A
Closest named color: Dark Grass Green (#388004). oklch(55% 0.147 131.3), rgb(81, 130, 10).
Aa
White text reads best on this color (4.61:1).
About this color
#51820A is a medium-dark, vivid green. In OKLCH its lightness is 55%, its chroma 0.147 and its hue 131°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Grass Green (#388004), ΔE 0.027 away. White text reads best on it, at 4.61:1.
| Hue family | Greens |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Dark Grass Green (#388004) |
| Black text | 4.54:1 |
| White text | 4.61:1 |
Values
| HEX | #51820A |
| RGB | rgb(81, 130, 10) |
| HSL | hsl(84, 86%, 27%) |
| OKLCH | oklch(55% 0.147 131.3) |
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 #51820A | 4.61:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #51820A | 4.54:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #51820A text on white | 4.61:1 | AA | Lc 71.8 | Content text, not long reading |
| #51820A text on black | 4.54:1 | AA | Lc -29.8 | 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 600.
-
Step 50
50
#F3F7F1
oklch(97.1% 0.009 134.9)
-
Step 100
100
#E5EDE0
oklch(93.6% 0.019 133.1)
-
Step 200
200
#D1DFC6
oklch(88.6% 0.037 131.2)
-
Step 300
300
#B1CA9E
oklch(80.9% 0.066 131.9)
-
Step 400
400
#89AE67
oklch(70.6% 0.105 131.1)
-
Step 500
500
#6B9A3A
oklch(63.2% 0.137 131.4)
-
Step 600
600 (this color)
#51820A
oklch(55% 0.147 131.3)
-
Step 700
700
#446F00
oklch(49.1% 0.134 131.1)
-
Step 800
800
#375B06
oklch(42.7% 0.114 131.5)
-
Step 900
900
#304B12
oklch(37.8% 0.089 131.4)
-
Step 950
950
#1C2C0C
oklch(27% 0.057 131.6)
#51820A 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) | #887700 | 0.080 |
| Deuteranopia (no green cones) | #82741C | 0.080 |
| Tritanopia (no blue cones) | #537C6E | 0.113 |
| Achromatopsia (no color) | #757575 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51820A
#51820A
oklch(55% 0.147 131.3)
- #8D54B0
#8D54B0
oklch(55% 0.148 311)
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 #51820A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grass Green #388004 ΔE 0.027
- Sap Green #5C8B15 ΔE 0.031
- Olive Green #677A04 ΔE 0.034
- Tree Green #2A7E19 ΔE 0.038
- Mossy Green #638B27 ΔE 0.039
- Forest Green #228B22 ΔE 0.039
- Murky Green #6C7A0E ΔE 0.041
- Swamp Green #748500 ΔE 0.047
Use #51820A 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.