#18D589
Closest named color: Seaweed (#18D17B). oklch(77.1% 0.175 158.4), rgb(24, 213, 137).
Aa
Black text reads best on this color (10.91:1).
About this color
#18D589 is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.175 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 10.91:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.175) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.91:1 |
| White text | 1.92:1 |
Values
| HEX | #18D589 |
| RGB | rgb(24, 213, 137) |
| HSL | hsl(156, 80%, 46%) |
| OKLCH | oklch(77.1% 0.175 158.4) |
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 #18D589 | 1.92:1 | Fails | Lc -40.4 | Non-text elements, placeholder text |
| Black text on #18D589 | 10.91:1 | AAA | Lc 67.7 | Content text, not long reading |
| #18D589 text on white | 1.92:1 | Fails | Lc 36.2 | Non-text elements, placeholder text |
| #18D589 text on black | 10.91:1 | AAA | Lc -66.3 | 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
#E9FBF0
oklch(97.2% 0.024 159.2)
-
Step 100
100
#CFF5DD
oklch(93.7% 0.051 157.6)
-
Step 200
200
#A1EDC1
oklch(88.5% 0.097 158.3)
-
Step 300
300 (this color)
#18D589
oklch(77.1% 0.175 158.4)
-
Step 400
400
#00BE79
oklch(70.6% 0.164 158.6)
-
Step 500
500
#00A367
oklch(63% 0.146 158.5)
-
Step 600
600
#008956
oklch(55.5% 0.129 158.6)
-
Step 700
700
#007447
oklch(49.2% 0.115 158)
-
Step 800
800
#005F3A
oklch(42.8% 0.099 158.5)
-
Step 900
900
#004F2F
oklch(37.7% 0.088 158.2)
-
Step 950
950
#002F1A
oklch(26.9% 0.063 158.2)
#18D589 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) | #D3C484 | 0.162 |
| Deuteranopia (no green cones) | #BFB58E | 0.158 |
| Tritanopia (no blue cones) | #00D4C1 | 0.078 |
| Achromatopsia (no color) | #BBBBBB | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18D589
#18D589
oklch(77.1% 0.175 158.4)
- #FA84DA
#FA84DA
oklch(77.1% 0.175 338.4)
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 #18D589, closest first.
No curated palette has a color within ΔE 0.04 of #18D589.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.018
- Emerald #06D6A0 ΔE 0.029
- Aqua Green #12E193 ΔE 0.033
- Greenblue #23C48B ΔE 0.050
- Algae Green #21C36F ΔE 0.053
- Weird Green #3AE57F ΔE 0.053
- Dark Mint #48C072 ΔE 0.057
- Dark Mint Green #20C073 ΔE 0.059
Use #18D589 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.