#528B33
Closest named color: Fern Green (#548D44). oklch(57.8% 0.135 136.2), rgb(82, 139, 51).
Aa
Black text reads best on this color (5.09:1).
About this color
#528B33 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.135 and its hue 136°. 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 5.09:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.09:1 |
| White text | 4.11:1 |
Values
| HEX | #528B33 |
| RGB | rgb(82, 139, 51) |
| HSL | hsl(99, 46%, 37%) |
| OKLCH | oklch(57.8% 0.135 136.2) |
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 #528B33 | 4.11:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #528B33 | 5.09:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #528B33 text on white | 4.11:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #528B33 text on black | 5.09:1 | AA | Lc -33.6 | 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
#E5EDE1
oklch(93.7% 0.018 134.9)
-
Step 200
200
#CFDFC9
oklch(88.6% 0.034 137.1)
-
Step 300
300
#AFCAA3
oklch(80.8% 0.061 136.1)
-
Step 400
400
#85AF71
oklch(70.8% 0.098 136)
-
Step 500
500
#659A4B
oklch(63% 0.124 136.3)
-
Step 600
600 (this color)
#528B33
oklch(57.8% 0.135 136.2)
-
Step 700
700
#3D701E
oklch(49.1% 0.125 136)
-
Step 800
800
#325B1B
oklch(42.6% 0.104 136.2)
-
Step 900
900
#2D4B1D
oklch(37.7% 0.08 136)
-
Step 950
950
#1A2C12
oklch(27% 0.051 136.8)
#528B33 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) | #908029 | 0.085 |
| Deuteranopia (no green cones) | #887B3A | 0.085 |
| Tritanopia (no blue cones) | #508678 | 0.096 |
| Achromatopsia (no color) | #7D7D7D | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #528B33
#528B33
oklch(57.8% 0.135 136.2)
- #985EAF
#985EAF
oklch(57.8% 0.135 315.8)
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 #528B33, 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 0.019
- Sap Green #5C8B15 ΔE 0.021
- Moss Green #658B38 ΔE 0.024
- Olive Drab #6B8E23 ΔE 0.032
- Light Forest Green #4F9153 ΔE 0.034
- Swamp #698339 ΔE 0.037
- Swamp Green #748500 ΔE 0.042
Use #528B33 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.