#12BB57
Closest named color: Shamrock (#01B44C). oklch(69.3% 0.188 149.7), rgb(18, 187, 87).
Aa
Black text reads best on this color (8.27:1).
About this color
#12BB57 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.188 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.022 away. Black text reads best on it, at 8.27:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.188) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 8.27:1 |
| White text | 2.53:1 |
Values
| HEX | #12BB57 |
| RGB | rgb(18, 187, 87) |
| HSL | hsl(144, 82%, 40%) |
| OKLCH | oklch(69.3% 0.188 149.7) |
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 #12BB57 | 2.53:1 | Fails | Lc -54.2 | Large or bold text, headings |
| Black text on #12BB57 | 8.27:1 | AAA | Lc 54.9 | Large or bold text, headings |
| #12BB57 text on white | 2.53:1 | Fails | Lc 49.1 | Large or bold text, headings |
| #12BB57 text on black | 8.27:1 | AAA | Lc -52.9 | 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
#EEF9F0
oklch(97.1% 0.017 151.1)
-
Step 100
100
#DBF1DE
oklch(93.7% 0.034 149.3)
-
Step 200
200
#BBE6C2
oklch(88.5% 0.066 149.6)
-
Step 300
300
#87D698
oklch(80.9% 0.117 150)
-
Step 400
400 (this color)
#12BB57
oklch(69.3% 0.188 149.7)
-
Step 500
500
#00A54A
oklch(63.1% 0.175 149.7)
-
Step 600
600
#008B3D
oklch(55.6% 0.154 149.7)
-
Step 700
700
#007532
oklch(49.1% 0.137 149.6)
-
Step 800
800
#006028
oklch(42.7% 0.119 149.7)
-
Step 900
900
#005020
oklch(37.7% 0.105 149.6)
-
Step 950
950
#003011
oklch(27% 0.074 150)
#12BB57 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) | #BCAA4E | 0.153 |
| Deuteranopia (no green cones) | #AB9E5F | 0.152 |
| Tritanopia (no blue cones) | #00B7A4 | 0.106 |
| Achromatopsia (no color) | #A2A2A2 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12BB57
#12BB57
oklch(69.3% 0.188 149.7)
- #DA6AD3
#DA6AD3
oklch(69.3% 0.188 329.8)
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 #12BB57, closest first.
No curated palette has a color within ΔE 0.04 of #12BB57.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.022
- Shamrock Green #02C14D ΔE 0.023
- Cool Green #33B864 ΔE 0.023
- Leafy Green #51B73B ΔE 0.031
- Algae Green #21C36F ΔE 0.033
- Dark Mint Green #20C073 ΔE 0.034
- Medium Green #39AD48 ΔE 0.038
- Dark Mint #48C072 ΔE 0.043
Use #12BB57 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.