#18A558
Closest named color: Mid Green (#50A747). oklch(63.5% 0.159 152.4), rgb(24, 165, 88).
Aa
Black text reads best on this color (6.56:1).
About this color
#18A558 is a medium-light, vivid green. In OKLCH its lightness is 63%, its chroma 0.159 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mid Green (#50A747), ΔE 0.034 away. Black text reads best on it, at 6.56:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.159) |
| Temperature | in between |
| Nearest name | Mid Green (#50A747) |
| Black text | 6.56:1 |
| White text | 3.20:1 |
Values
| HEX | #18A558 |
| RGB | rgb(24, 165, 88) |
| HSL | hsl(147, 75%, 37%) |
| OKLCH | oklch(63.5% 0.159 152.4) |
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 #18A558 | 3.20:1 | AA large text | Lc -64.1 | Content text, not long reading |
| Black text on #18A558 | 6.56:1 | AA | Lc 45.4 | Large or bold text, headings |
| #18A558 text on white | 3.20:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #18A558 text on black | 6.56:1 | AA | Lc -43.1 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F8F2
oklch(97.2% 0.011 149.9)
-
Step 100
100
#DFEEE3
oklch(93.5% 0.022 154.1)
-
Step 200
200
#C5E2CC
oklch(88.5% 0.043 152.7)
-
Step 300
300
#9BD0A8
oklch(81% 0.079 151.9)
-
Step 400
400
#5DB77A
oklch(70.8% 0.125 152.5)
-
Step 500
500 (this color)
#18A558
oklch(63.5% 0.159 152.4)
-
Step 600
600
#008A46
oklch(55.5% 0.145 152.3)
-
Step 700
700
#00743A
oklch(49% 0.128 152.4)
-
Step 800
800
#00602F
oklch(42.8% 0.112 152.4)
-
Step 900
900
#005026
oklch(37.8% 0.099 152.3)
-
Step 950
950
#042F16
oklch(26.9% 0.065 152.8)
#18A558 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) | #A59652 | 0.136 |
| Deuteranopia (no green cones) | #968C5D | 0.133 |
| Tritanopia (no blue cones) | #00A393 | 0.084 |
| Achromatopsia (no color) | #909090 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18A558
#18A558
oklch(63.5% 0.159 152.4)
- #C161B4
#C161B4
oklch(63.5% 0.16 332.6)
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 #18A558, closest first.
No curated palette has a color within ΔE 0.04 of #18A558.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Green #50A747 ΔE 0.034
- Seaweed Green #35AD6B ΔE 0.035
- Jade Green #2BAF6A ΔE 0.035
- Medium Green #39AD48 ΔE 0.036
- Jade #1FA774 ΔE 0.036
- Muted Green #5FA052 ΔE 0.043
- Dark Pastel Green #56AE57 ΔE 0.047
- Algae #54AC68 ΔE 0.048
Use #18A558 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.