#12B259
Closest named color: Shamrock (#01B44C). oklch(67% 0.176 151.1), rgb(18, 178, 89).
Aa
Black text reads best on this color (7.53:1).
About this color
#12B259 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.176 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.017 away. Black text reads best on it, at 7.53:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.53:1 |
| White text | 2.78:1 |
Values
| HEX | #12B259 |
| RGB | rgb(18, 178, 89) |
| HSL | hsl(147, 82%, 38%) |
| OKLCH | oklch(67% 0.176 151.1) |
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 #12B259 | 2.78:1 | Fails | Lc -58.3 | Large or bold text, headings |
| Black text on #12B259 | 7.53:1 | AAA | Lc 51.0 | Large or bold text, headings |
| #12B259 text on white | 2.78:1 | Fails | Lc 53.0 | Large or bold text, headings |
| #12B259 text on black | 7.53:1 | AAA | Lc -48.8 | 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
#DBF0DF
oklch(93.5% 0.032 151.2)
-
Step 200
200
#BDE5C5
oklch(88.5% 0.06 150.9)
-
Step 300
300
#8AD59C
oklch(80.9% 0.11 150.9)
-
Step 400
400 (this color)
#12B259
oklch(67% 0.176 151.1)
-
Step 500
500
#00A550
oklch(63.2% 0.17 151.1)
-
Step 600
600
#008B42
oklch(55.7% 0.15 151)
-
Step 700
700
#007537
oklch(49.2% 0.132 151.1)
-
Step 800
800
#00602C
oklch(42.8% 0.115 151.2)
-
Step 900
900
#005023
oklch(37.7% 0.102 150.9)
-
Step 950
950
#003013
oklch(27.1% 0.072 151.4)
#12B259 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) | #B3A252 | 0.147 |
| Deuteranopia (no green cones) | #A29660 | 0.145 |
| Tritanopia (no blue cones) | #00AF9D | 0.096 |
| Achromatopsia (no color) | #9B9B9B | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12B259
#12B259
oklch(67% 0.176 151.1)
- #D067C6
#D067C6
oklch(67% 0.175 331)
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 #12B259, closest first.
No curated palette has a color within ΔE 0.04 of #12B259.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.017
- Medium Green #39AD48 ΔE 0.020
- Cool Green #33B864 ΔE 0.025
- Jade Green #2BAF6A ΔE 0.027
- Seaweed Green #35AD6B ΔE 0.033
- Dark Pastel Green #56AE57 ΔE 0.034
- Green Teal #0CB577 ΔE 0.036
- Medium Sea Green #3CB371 ΔE 0.037
Use #12B259 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.