#18CB83
Closest named color: Seaweed (#18D17B). oklch(74.4% 0.168 158.5), rgb(24, 203, 131).
Aa
Black text reads best on this color (9.90:1).
About this color
#18CB83 is a medium-light, vivid green. In OKLCH its lightness is 74%, its chroma 0.168 and its hue 159°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.023 away. Black text reads best on it, at 9.90:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.168) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 9.90:1 |
| White text | 2.11:1 |
Values
| HEX | #18CB83 |
| RGB | rgb(24, 203, 131) |
| HSL | hsl(156, 79%, 45%) |
| OKLCH | oklch(74.4% 0.168 158.5) |
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 #18CB83 | 2.11:1 | Fails | Lc -45.5 | Large or bold text, headings |
| Black text on #18CB83 | 9.90:1 | AAA | Lc 63.0 | Content text, not long reading |
| #18CB83 text on white | 2.11:1 | Fails | Lc 40.9 | Non-text elements, placeholder text |
| #18CB83 text on black | 9.90:1 | AAA | Lc -61.3 | 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 400.
-
Step 50
50
#EEF9F2
oklch(97.2% 0.015 158.3)
-
Step 100
100
#DAF0E2
oklch(93.5% 0.03 157.9)
-
Step 200
200
#B9E6CB
oklch(88.6% 0.06 158.6)
-
Step 300
300
#83D6A7
oklch(81% 0.106 158.1)
-
Step 400
400 (this color)
#18CB83
oklch(74.4% 0.168 158.5)
-
Step 500
500
#00A367
oklch(63% 0.146 158.5)
-
Step 600
600
#008956
oklch(55.5% 0.129 158.6)
-
Step 700
700
#007348
oklch(49% 0.113 158.9)
-
Step 800
800
#005F3A
oklch(42.8% 0.099 158.5)
-
Step 900
900
#004F30
oklch(37.7% 0.087 158.9)
-
Step 950
950
#002F1B
oklch(26.9% 0.062 159.3)
#18CB83 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) | #C9BA7E | 0.156 |
| Deuteranopia (no green cones) | #B6AC88 | 0.153 |
| Tritanopia (no blue cones) | #00CAB8 | 0.075 |
| Achromatopsia (no color) | #B2B2B2 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18CB83
#18CB83
oklch(74.4% 0.168 158.5)
- #EF7ED0
#EF7ED0
oklch(74.5% 0.169 338.6)
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 #18CB83, closest first.
No curated palette has a color within ΔE 0.04 of #18CB83.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.023
- Greenblue #23C48B ΔE 0.026
- Algae Green #21C36F ΔE 0.028
- Dark Mint #48C072 ΔE 0.032
- Dark Mint Green #20C073 ΔE 0.032
- Green Blue #01C08D ΔE 0.039
- Emerald #06D6A0 ΔE 0.042
- Soft Green #6FC276 ΔE 0.047
Use #18CB83 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.