#18B879
Closest named color: Dark Seafoam (#1FB57A). oklch(69.2% 0.154 159.4), rgb(24, 184, 121).
Aa
Black text reads best on this color (8.17:1).
About this color
#18B879 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.154 and its hue 159°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.009 away. Black text reads best on it, at 8.17:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.154) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 8.17:1 |
| White text | 2.57:1 |
Values
| HEX | #18B879 |
| RGB | rgb(24, 184, 121) |
| HSL | hsl(156, 77%, 41%) |
| OKLCH | oklch(69.2% 0.154 159.4) |
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 #18B879 | 2.57:1 | Fails | Lc -54.8 | Large or bold text, headings |
| Black text on #18B879 | 8.17:1 | AAA | Lc 54.3 | Large or bold text, headings |
| #18B879 text on white | 2.57:1 | Fails | Lc 49.7 | Large or bold text, headings |
| #18B879 text on black | 8.17:1 | AAA | Lc -52.2 | 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
#EFF8F2
oklch(97.1% 0.012 157)
-
Step 100
100
#DBF0E3
oklch(93.6% 0.028 158.7)
-
Step 200
200
#BCE5CD
oklch(88.6% 0.054 159.4)
-
Step 300
300
#88D4AB
oklch(80.9% 0.096 159.7)
-
Step 400
400 (this color)
#18B879
oklch(69.2% 0.154 159.4)
-
Step 500
500
#00A369
oklch(63.1% 0.144 159.3)
-
Step 600
600
#008958
oklch(55.6% 0.127 159.5)
-
Step 700
700
#007349
oklch(49% 0.112 159.4)
-
Step 800
800
#005F3B
oklch(42.8% 0.098 159.1)
-
Step 900
900
#004F31
oklch(37.7% 0.086 159.7)
-
Step 950
950
#002F1B
oklch(26.9% 0.062 159.3)
#18B879 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) | #B6A975 | 0.144 |
| Deuteranopia (no green cones) | #A49C7D | 0.140 |
| Tritanopia (no blue cones) | #00B7A8 | 0.068 |
| Achromatopsia (no color) | #A1A1A1 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18B879
#18B879
oklch(69.2% 0.154 159.4)
- #D873BB
#D873BB
oklch(69.2% 0.153 339.1)
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 #18B879, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.009
- Green Teal #0CB577 ΔE 0.009
- Medium Sea Green #3CB371 ΔE 0.017
- Bluey Green #2BB179 ΔE 0.021
- Cool Green #33B864 ΔE 0.026
- Jade Green #2BAF6A ΔE 0.027
- Dark Seafoam Green #3EAF76 ΔE 0.027
- Dark Mint Green #20C073 ΔE 0.027
Use #18B879 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.