#18CA7C
Closest named color: Seaweed (#18D17B). oklch(74% 0.173 156.6), rgb(24, 202, 124).
Aa
Black text reads best on this color (9.77:1).
About this color
#18CA7C is a medium-light, vivid green. In OKLCH its lightness is 74%, its chroma 0.173 and its hue 157°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.021 away. Black text reads best on it, at 9.77:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 9.77:1 |
| White text | 2.14:1 |
Values
| HEX | #18CA7C |
| RGB | rgb(24, 202, 124) |
| HSL | hsl(154, 79%, 44%) |
| OKLCH | oklch(74% 0.173 156.6) |
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 #18CA7C | 2.14:1 | Fails | Lc -46.2 | Large or bold text, headings |
| Black text on #18CA7C | 9.77:1 | AAA | Lc 62.4 | Content text, not long reading |
| #18CA7C text on white | 2.14:1 | Fails | Lc 41.6 | Non-text elements, placeholder text |
| #18CA7C text on black | 9.77:1 | AAA | Lc -60.7 | 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
#EEF9F1
oklch(97.2% 0.016 154.5)
-
Step 100
100
#DAF1E1
oklch(93.7% 0.032 155.4)
-
Step 200
200
#BAE6C9
oklch(88.6% 0.061 156.1)
-
Step 300
300
#83D6A4
oklch(80.9% 0.108 156.5)
-
Step 400
400 (this color)
#18CA7C
oklch(74% 0.173 156.6)
-
Step 500
500
#00A462
oklch(63.2% 0.152 156.5)
-
Step 600
600
#008A52
oklch(55.7% 0.134 156.6)
-
Step 700
700
#007444
oklch(49.2% 0.118 156.6)
-
Step 800
800
#005F37
oklch(42.7% 0.102 156.7)
-
Step 900
900
#004F2D
oklch(37.6% 0.09 156.8)
-
Step 950
950
#002F19
oklch(26.9% 0.064 157.1)
#18CA7C 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) | #C9B977 | 0.157 |
| Deuteranopia (no green cones) | #B6AB81 | 0.154 |
| Tritanopia (no blue cones) | #00C8B6 | 0.082 |
| Achromatopsia (no color) | #B1B1B1 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18CA7C
#18CA7C
oklch(74% 0.173 156.6)
- #ED7BD3
#ED7BD3
oklch(73.9% 0.174 336.5)
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 #18CA7C, closest first.
No curated palette has a color within ΔE 0.04 of #18CA7C.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.021
- Algae Green #21C36F ΔE 0.022
- Dark Mint Green #20C073 ΔE 0.028
- Dark Mint #48C072 ΔE 0.029
- Greenblue #23C48B ΔE 0.030
- Green Blue #01C08D ΔE 0.042
- Soft Green #6FC276 ΔE 0.048
- Emerald #06D6A0 ΔE 0.049
Use #18CA7C 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.