#18BF55
Closest named color: Shamrock Green (#02C14D). oklch(70.4% 0.194 148.8), rgb(24, 191, 85).
Aa
Black text reads best on this color (8.62:1).
About this color
#18BF55 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.194 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock Green (#02C14D), ΔE 0.012 away. Black text reads best on it, at 8.62:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.194) |
| Temperature | in between |
| Nearest name | Shamrock Green (#02C14D) |
| Black text | 8.62:1 |
| White text | 2.43:1 |
Values
| HEX | #18BF55 |
| RGB | rgb(24, 191, 85) |
| HSL | hsl(142, 78%, 42%) |
| OKLCH | oklch(70.4% 0.194 148.8) |
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 #18BF55 | 2.43:1 | Fails | Lc -52.3 | Large or bold text, headings |
| Black text on #18BF55 | 8.62:1 | AAA | Lc 56.7 | Large or bold text, headings |
| #18BF55 text on white | 2.43:1 | Fails | Lc 47.3 | Large or bold text, headings |
| #18BF55 text on black | 8.62:1 | AAA | Lc -54.7 | 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
#DBF1DD
oklch(93.7% 0.035 147.9)
-
Step 200
200
#BBE6C1
oklch(88.5% 0.067 148.9)
-
Step 300
300
#87D695
oklch(80.8% 0.12 148.8)
-
Step 400
400 (this color)
#18BF55
oklch(70.4% 0.194 148.8)
-
Step 500
500
#00A546
oklch(63% 0.178 148.9)
-
Step 600
600
#008B3A
oklch(55.6% 0.157 148.9)
-
Step 700
700
#00752F
oklch(49.1% 0.139 148.8)
-
Step 800
800
#006025
oklch(42.7% 0.121 148.7)
-
Step 900
900
#00501E
oklch(37.6% 0.107 148.8)
-
Step 950
950
#00300F
oklch(27% 0.076 148.8)
#18BF55 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) | #C1AD4B | 0.156 |
| Deuteranopia (no green cones) | #AFA15D | 0.154 |
| Tritanopia (no blue cones) | #00BBA7 | 0.111 |
| Achromatopsia (no color) | #A6A6A6 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18BF55
#18BF55
oklch(70.4% 0.194 148.8)
- #DF6CDA
#DF6CDA
oklch(70.5% 0.194 329.1)
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 #18BF55, closest first.
No curated palette has a color within ΔE 0.04 of #18BF55.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock Green #02C14D ΔE 0.012
- Algae Green #21C36F ΔE 0.030
- Leafy Green #51B73B ΔE 0.031
- Cool Green #33B864 ΔE 0.031
- Shamrock #01B44C ΔE 0.033
- Dark Mint Green #20C073 ΔE 0.035
- Dark Mint #48C072 ΔE 0.043
- Frog Green #58BC08 ΔE 0.046
Use #18BF55 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.