#18C877
Closest named color: Algae Green (#21C36F). oklch(73.4% 0.175 155.5), rgb(24, 200, 119).
Aa
Black text reads best on this color (9.56:1).
About this color
#18C877 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.175 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.015 away. Black text reads best on it, at 9.56:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.175) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.56:1 |
| White text | 2.19:1 |
Values
| HEX | #18C877 |
| RGB | rgb(24, 200, 119) |
| HSL | hsl(152, 79%, 44%) |
| OKLCH | oklch(73.4% 0.175 155.5) |
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 #18C877 | 2.19:1 | Fails | Lc -47.3 | Large or bold text, headings |
| Black text on #18C877 | 9.56:1 | AAA | Lc 61.4 | Content text, not long reading |
| #18C877 text on white | 2.19:1 | Fails | Lc 42.6 | Non-text elements, placeholder text |
| #18C877 text on black | 9.56:1 | AAA | Lc -59.6 | 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
#EEF9F1
oklch(97.2% 0.016 154.5)
-
Step 100
100
#DAF1E1
oklch(93.7% 0.032 155.4)
-
Step 200
200
#BAE6C8
oklch(88.6% 0.061 155.2)
-
Step 300
300
#84D6A2
oklch(80.9% 0.11 155.3)
-
Step 400
400 (this color)
#18C877
oklch(73.4% 0.175 155.5)
-
Step 500
500
#00A45F
oklch(63.2% 0.155 155.5)
-
Step 600
600
#008A4F
oklch(55.7% 0.136 155.4)
-
Step 700
700
#007442
oklch(49.1% 0.12 155.6)
-
Step 800
800
#005F35
oklch(42.7% 0.104 155.6)
-
Step 900
900
#004F2B
oklch(37.6% 0.092 155.5)
-
Step 950
950
#003018
oklch(27.2% 0.067 155.5)
#18C877 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) | #C7B771 | 0.156 |
| Deuteranopia (no green cones) | #B4AA7D | 0.152 |
| Tritanopia (no blue cones) | #00C6B4 | 0.086 |
| Achromatopsia (no color) | #AFAFAF | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18C877
#18C877
oklch(73.4% 0.175 155.5)
- #EA79D3
#EA79D3
oklch(73.3% 0.175 335.4)
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 #18C877, closest first.
No curated palette has a color within ΔE 0.04 of #18C877.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.015
- Dark Mint Green #20C073 ΔE 0.022
- Seaweed #18D17B ΔE 0.025
- Dark Mint #48C072 ΔE 0.025
- Greenblue #23C48B ΔE 0.032
- Green Blue #01C08D ΔE 0.043
- Cool Green #33B864 ΔE 0.044
- Shamrock Green #02C14D ΔE 0.047
Use #18C877 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.