#558E63
Closest named color: Slate Green (#658D6D). oklch(59.5% 0.089 150.8), rgb(85, 142, 99).
Aa
Black text reads best on this color (5.43:1).
About this color
#558E63 is a medium-dark, moderately saturated green. In OKLCH its lightness is 60%, its chroma 0.089 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.025 away. Black text reads best on it, at 5.43:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.089) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.43:1 |
| White text | 3.86:1 |
Values
| HEX | #558E63 |
| RGB | rgb(85, 142, 99) |
| HSL | hsl(135, 25%, 45%) |
| OKLCH | oklch(59.5% 0.089 150.8) |
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 #558E63 | 3.86:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #558E63 | 5.43:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #558E63 text on white | 3.86:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #558E63 text on black | 5.43:1 | AA | Lc -35.7 | 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
#F3F7F3
oklch(97.2% 0.007 145.5)
-
Step 100
100
#E4ECE6
oklch(93.5% 0.012 153.7)
-
Step 200
200
#CEDED1
oklch(88.5% 0.025 151.1)
-
Step 300
300
#ADC9B2
oklch(80.9% 0.044 150.4)
-
Step 400
400
#81AD8A
oklch(70.6% 0.069 150.6)
-
Step 500
500 (this color)
#558E63
oklch(59.5% 0.089 150.8)
-
Step 600
600
#448355
oklch(55.5% 0.097 150.9)
-
Step 700
700
#366F45
oklch(49.1% 0.09 150.5)
-
Step 800
800
#2D5A39
oklch(42.6% 0.074 150.8)
-
Step 900
900
#294A31
oklch(37.6% 0.058 150.6)
-
Step 950
950
#192C1D
oklch(27.2% 0.037 150)
#558E63 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) | #8F8560 | 0.077 |
| Deuteranopia (no green cones) | #867F65 | 0.075 |
| Tritanopia (no blue cones) | #4B8C83 | 0.049 |
| Achromatopsia (no color) | #828282 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558E63
#558E63
oklch(59.5% 0.089 150.8)
- #9D6B98
#9D6B98
oklch(59.5% 0.089 330.1)
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 #558E63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.025
- Dark Sage #598556 ΔE 0.027
- Light Forest Green #4F9153 ΔE 0.027
- Ocean Green #3D9973 ΔE 0.034
- Viridian #1E9167 ΔE 0.037
- Fern Green #548D44 ΔE 0.039
- Sea Green #2E8B57 ΔE 0.041
- Green Grey #77926F ΔE 0.048
Use #558E63 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.