#51913B
Closest named color: Fern Green (#548D44). oklch(59.4% 0.137 138.5), rgb(81, 145, 59).
Aa
Black text reads best on this color (5.46:1).
About this color
#51913B is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.137 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern Green (#548D44), ΔE 0.018 away. Black text reads best on it, at 5.46:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.137) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.46:1 |
| White text | 3.84:1 |
Values
| HEX | #51913B |
| RGB | rgb(81, 145, 59) |
| HSL | hsl(105, 42%, 40%) |
| OKLCH | oklch(59.4% 0.137 138.5) |
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 #51913B | 3.84:1 | AA large text | Lc -71.2 | Content text, not long reading |
| Black text on #51913B | 5.46:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #51913B text on white | 3.84:1 | AA large text | Lc 65.7 | Content text, not long reading |
| #51913B text on black | 5.46:1 | AA | Lc -35.9 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E4EDE1
oklch(93.6% 0.019 137.8)
-
Step 200
200
#CDDFC8
oklch(88.4% 0.037 138.9)
-
Step 300
300
#ABCCA2
oklch(81% 0.068 139)
-
Step 400
400
#7EB16E
oklch(70.8% 0.108 138.4)
-
Step 500
500 (this color)
#51913B
oklch(59.4% 0.137 138.5)
-
Step 600
600
#408725
oklch(55.7% 0.15 138.5)
-
Step 700
700
#327217
oklch(49.1% 0.138 138.4)
-
Step 800
800
#2A5D17
oklch(42.7% 0.115 138.6)
-
Step 900
900
#274C1A
oklch(37.6% 0.089 138.4)
-
Step 950
950
#172D10
oklch(27% 0.058 138.6)
#51913B 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) | #958532 | 0.091 |
| Deuteranopia (no green cones) | #8C8041 | 0.090 |
| Tritanopia (no blue cones) | #4D8C7E | 0.094 |
| Achromatopsia (no color) | #828282 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51913B
#51913B
oklch(59.4% 0.137 138.5)
- #A061B2
#A061B2
oklch(59.3% 0.137 318.5)
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 #51913B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern Green #548D44 ΔE 0.018
- Mossy Green #638B27 ΔE 0.024
- Moss Green #658B38 ΔE 0.026
- Sap Green #5C8B15 ΔE 0.027
- Light Forest Green #4F9153 ΔE 0.027
- Olive Drab #6B8E23 ΔE 0.030
- Dark Yellow Green #728F02 ΔE 0.042
- Kelley Green #009337 ΔE 0.043
Use #51913B 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.