#28B840
Closest named color: Shamrock (#01B44C). oklch(68.5% 0.199 145.2), rgb(40, 184, 64).
Aa
Black text reads best on this color (8.02:1).
About this color
#28B840 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.199 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.020 away. Black text reads best on it, at 8.02:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.199) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 8.02:1 |
| White text | 2.61:1 |
Values
| HEX | #28B840 |
| RGB | rgb(40, 184, 64) |
| HSL | hsl(130, 64%, 44%) |
| OKLCH | oklch(68.5% 0.199 145.2) |
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 #28B840 | 2.61:1 | Fails | Lc -55.6 | Large or bold text, headings |
| Black text on #28B840 | 8.02:1 | AAA | Lc 53.5 | Large or bold text, headings |
| #28B840 text on white | 2.61:1 | Fails | Lc 50.5 | Large or bold text, headings |
| #28B840 text on black | 8.02:1 | AAA | Lc -51.4 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF9EF
oklch(97.2% 0.017 145.4)
-
Step 100
100
#DCF1DC
oklch(93.7% 0.036 145.3)
-
Step 200
200
#BDE6BE
oklch(88.5% 0.069 145.6)
-
Step 300
300
#8BD68E
oklch(80.9% 0.125 145.2)
-
Step 400
400 (this color)
#28B840
oklch(68.5% 0.199 145.2)
-
Step 500
500
#00A62E
oklch(63% 0.197 145.2)
-
Step 600
600
#008C25
oklch(55.6% 0.174 145.1)
-
Step 700
700
#00761E
oklch(49.2% 0.154 145.2)
-
Step 800
800
#006117
oklch(42.8% 0.134 145.2)
-
Step 900
900
#005112
oklch(37.8% 0.118 145.3)
-
Step 950
950
#003007
oklch(26.9% 0.084 145.2)
#28B840 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) | #BBA731 | 0.149 |
| Deuteranopia (no green cones) | #AB9C4B | 0.148 |
| Tritanopia (no blue cones) | #00B39F | 0.123 |
| Achromatopsia (no color) | #A0A0A0 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28B840
#28B840
oklch(68.5% 0.199 145.2)
- #D566DC
#D566DC
oklch(68.6% 0.199 325.2)
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 #28B840, closest first.
No curated palette has a color within ΔE 0.04 of #28B840.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.020
- Leafy Green #51B73B ΔE 0.022
- Shamrock Green #02C14D ΔE 0.025
- Medium Green #39AD48 ΔE 0.035
- Frog Green #58BC08 ΔE 0.039
- Cool Green #33B864 ΔE 0.039
- Grass #5CAC2D ΔE 0.040
- Kelly Green #02AB2E ΔE 0.041
Use #28B840 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.