#509128
Closest named color: Sap Green (#5C8B15). oklch(59.1% 0.152 136), rgb(80, 145, 40).
Aa
Black text reads best on this color (5.42:1).
About this color
#509128 is a medium-dark, vivid green. In OKLCH its lightness is 59%, its chroma 0.152 and its hue 136°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sap Green (#5C8B15), ΔE 0.019 away. Black text reads best on it, at 5.42:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.152) |
| Temperature | in between |
| Nearest name | Sap Green (#5C8B15) |
| Black text | 5.42:1 |
| White text | 3.87:1 |
Values
| HEX | #509128 |
| RGB | rgb(80, 145, 40) |
| HSL | hsl(97, 57%, 36%) |
| OKLCH | oklch(59.1% 0.152 136) |
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 #509128 | 3.87:1 | AA large text | Lc -71.4 | Content text, not long reading |
| Black text on #509128 | 5.42:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #509128 text on white | 3.87:1 | AA large text | Lc 65.9 | Content text, not long reading |
| #509128 text on black | 5.42:1 | AA | Lc -35.7 | 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 600.
-
Step 50
50
#F3F7F1
oklch(97.1% 0.009 134.9)
-
Step 100
100
#E4EDE0
oklch(93.6% 0.02 135.8)
-
Step 200
200
#CEDFC7
oklch(88.4% 0.037 136.5)
-
Step 300
300
#ADCB9F
oklch(80.8% 0.068 135.8)
-
Step 400
400
#81B06A
oklch(70.6% 0.11 135.9)
-
Step 500
500
#609C40
oklch(63.1% 0.14 136.1)
-
Step 600
600 (this color)
#509128
oklch(59.1% 0.152 136)
-
Step 700
700
#377108
oklch(49% 0.141 135.9)
-
Step 800
800
#2E5C0E
oklch(42.6% 0.117 135.9)
-
Step 900
900
#294C15
oklch(37.7% 0.092 136.1)
-
Step 950
950
#192D0E
oklch(27.1% 0.058 135.8)
#509128 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) | #968517 | 0.093 |
| Deuteranopia (no green cones) | #8D7F32 | 0.095 |
| Tritanopia (no blue cones) | #4D8C7C | 0.108 |
| Achromatopsia (no color) | #818181 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509128
#509128
oklch(59.1% 0.152 136)
- #A05DBA
#A05DBA
oklch(59.1% 0.153 315.8)
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 #509128, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sap Green #5C8B15 ΔE 0.019
- Mossy Green #638B27 ΔE 0.025
- Olive Drab #6B8E23 ΔE 0.030
- Fern Green #548D44 ΔE 0.033
- Moss Green #658B38 ΔE 0.035
- Dark Yellow Green #728F02 ΔE 0.038
- Grass Green #3F9B0B ΔE 0.038
- Kelley Green #009337 ΔE 0.039
Use #509128 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.