#28B456
Closest named color: Shamrock (#01B44C). oklch(67.7% 0.177 149.1), rgb(40, 180, 86).
Aa
Black text reads best on this color (7.75:1).
About this color
#28B456 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.177 and its hue 149°. 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 7.75:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.75:1 |
| White text | 2.70:1 |
Values
| HEX | #28B456 |
| RGB | rgb(40, 180, 86) |
| HSL | hsl(140, 64%, 43%) |
| OKLCH | oklch(67.7% 0.177 149.1) |
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 #28B456 | 2.70:1 | Fails | Lc -57.2 | Large or bold text, headings |
| Black text on #28B456 | 7.75:1 | AAA | Lc 52.0 | Large or bold text, headings |
| #28B456 text on white | 2.70:1 | Fails | Lc 52.0 | Large or bold text, headings |
| #28B456 text on black | 7.75:1 | AAA | Lc -49.9 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DCF0DF
oklch(93.6% 0.031 149.8)
-
Step 200
200
#BEE5C4
oklch(88.5% 0.061 149.4)
-
Step 300
300
#8CD599
oklch(80.9% 0.112 149)
-
Step 400
400 (this color)
#28B456
oklch(67.7% 0.177 149.1)
-
Step 500
500
#00A547
oklch(63% 0.178 149.1)
-
Step 600
600
#008B3B
oklch(55.6% 0.156 149.2)
-
Step 700
700
#007530
oklch(49.1% 0.138 149)
-
Step 800
800
#006026
oklch(42.7% 0.12 149)
-
Step 900
900
#00501F
oklch(37.7% 0.106 149.2)
-
Step 950
950
#003010
oklch(27% 0.075 149.4)
#28B456 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) | #B5A44E | 0.142 |
| Deuteranopia (no green cones) | #A6995D | 0.142 |
| Tritanopia (no blue cones) | #00B19E | 0.099 |
| Achromatopsia (no color) | #9D9D9D | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28B456
#28B456
oklch(67.7% 0.177 149.1)
- #D16ACC
#D16ACC
oklch(67.8% 0.176 329.1)
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 #28B456, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.015
- Cool Green #33B864 ΔE 0.019
- Medium Green #39AD48 ΔE 0.020
- Dark Pastel Green #56AE57 ΔE 0.031
- Jade Green #2BAF6A ΔE 0.032
- Leafy Green #51B73B ΔE 0.034
- Medium Sea Green #3CB371 ΔE 0.037
- Mid Green #50A747 ΔE 0.038
Use #28B456 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.