#28B23A
Closest named color: Shamrock (#01B44C). oklch(66.9% 0.197 144.6), rgb(40, 178, 58).
Aa
Black text reads best on this color (7.51:1).
About this color
#28B23A is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.197 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.015 away. Black text reads best on it, at 7.51:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.197) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.51:1 |
| White text | 2.79:1 |
Values
| HEX | #28B23A |
| RGB | rgb(40, 178, 58) |
| HSL | hsl(128, 63%, 43%) |
| OKLCH | oklch(66.9% 0.197 144.6) |
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 #28B23A | 2.79:1 | Fails | Lc -58.5 | Large or bold text, headings |
| Black text on #28B23A | 7.51:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #28B23A text on white | 2.79:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #28B23A text on black | 7.51:1 | AAA | Lc -48.6 | 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 500.
-
Step 50
50
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DFEFDF
oklch(93.6% 0.027 145.4)
-
Step 200
200
#C4E3C4
oklch(88.5% 0.053 145.1)
-
Step 300
300
#9AD19A
oklch(80.8% 0.095 144.6)
-
Step 400
400
#5CB960
oklch(70.7% 0.154 144.6)
-
Step 500
500 (this color)
#28B23A
oklch(66.9% 0.197 144.6)
-
Step 600
600
#008C21
oklch(55.6% 0.177 144.7)
-
Step 700
700
#00761A
oklch(49.2% 0.156 144.6)
-
Step 800
800
#006113
oklch(42.8% 0.136 144.5)
-
Step 900
900
#00510F
oklch(37.8% 0.12 144.7)
-
Step 950
950
#033008
oklch(27% 0.082 144.6)
#28B23A 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) | #B5A12A | 0.145 |
| Deuteranopia (no green cones) | #A69745 | 0.144 |
| Tritanopia (no blue cones) | #00AD99 | 0.122 |
| Achromatopsia (no color) | #9B9B9B | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28B23A
#28B23A
oklch(66.9% 0.197 144.6)
- #CE62D6
#CE62D6
oklch(66.9% 0.196 324.8)
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 #28B23A, closest first.
No curated palette has a color within ΔE 0.04 of #28B23A.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.015
- Medium Green #39AD48 ΔE 0.024
- Kelly Green #02AB2E ΔE 0.025
- Leafy Green #51B73B ΔE 0.030
- Grass #5CAC2D ΔE 0.033
- Leaf Green #5CA904 ΔE 0.037
- Shamrock Green #02C14D ΔE 0.041
- Mid Green #50A747 ΔE 0.043
Use #28B23A 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.