#18D688
Closest named color: Seaweed (#18D17B). oklch(77.3% 0.177 157.9), rgb(24, 214, 136).
Aa
Black text reads best on this color (11.01:1).
About this color
#18D688 is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.177 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.018 away. Black text reads best on it, at 11.01:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 11.01:1 |
| White text | 1.90:1 |
Values
| HEX | #18D688 |
| RGB | rgb(24, 214, 136) |
| HSL | hsl(155, 80%, 47%) |
| OKLCH | oklch(77.3% 0.177 157.9) |
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 #18D688 | 1.90:1 | Fails | Lc -40.0 | Non-text elements, placeholder text |
| Black text on #18D688 | 11.01:1 | AAA | Lc 68.2 | Content text, not long reading |
| #18D688 text on white | 1.90:1 | Fails | Lc 35.7 | Non-text elements, placeholder text |
| #18D688 text on black | 11.01:1 | AAA | Lc -66.8 | Content text, not long reading |
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 300.
-
Step 50
50
#E9FBEF
oklch(97.2% 0.025 156.7)
-
Step 100
100
#CEF5DD
oklch(93.6% 0.052 158.2)
-
Step 200
200
#A1EDC0
oklch(88.4% 0.098 157.7)
-
Step 300
300 (this color)
#18D688
oklch(77.3% 0.177 157.9)
-
Step 400
400
#00BE77
oklch(70.6% 0.165 157.9)
-
Step 500
500
#00A366
oklch(63% 0.147 158.1)
-
Step 600
600
#008955
oklch(55.5% 0.129 158.2)
-
Step 700
700
#007446
oklch(49.2% 0.116 157.5)
-
Step 800
800
#005F39
oklch(42.8% 0.1 157.9)
-
Step 900
900
#004F2F
oklch(37.7% 0.088 158.2)
-
Step 950
950
#002F1A
oklch(26.9% 0.063 158.2)
#18D688 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) | #D4C483 | 0.163 |
| Deuteranopia (no green cones) | #C0B68D | 0.159 |
| Tritanopia (no blue cones) | #00D4C2 | 0.082 |
| Achromatopsia (no color) | #BCBCBC | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18D688
#18D688
oklch(77.3% 0.177 157.9)
- #FB84DC
#FB84DC
oklch(77.3% 0.177 337.9)
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 #18D688, closest first.
No curated palette has a color within ΔE 0.04 of #18D688.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.018
- Aqua Green #12E193 ΔE 0.030
- Emerald #06D6A0 ΔE 0.031
- Weird Green #3AE57F ΔE 0.049
- Greenblue #23C48B ΔE 0.054
- Algae Green #21C36F ΔE 0.055
- Dark Mint #48C072 ΔE 0.059
- Dark Mint Green #20C073 ΔE 0.062
Use #18D688 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.