#558F6B
Closest named color: Slate Green (#658D6D). oklch(60% 0.083 155.7), rgb(85, 143, 107).
Aa
Black text reads best on this color (5.52:1).
About this color
#558F6B is a medium-dark, moderately saturated green. In OKLCH its lightness is 60%, its chroma 0.083 and its hue 156°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.019 away. Black text reads best on it, at 5.52:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.083) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.52:1 |
| White text | 3.79:1 |
Values
| HEX | #558F6B |
| RGB | rgb(85, 143, 107) |
| HSL | hsl(143, 25%, 45%) |
| OKLCH | oklch(60% 0.083 155.7) |
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 #558F6B | 3.79:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #558F6B | 5.52:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #558F6B text on white | 3.79:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #558F6B text on black | 5.52:1 | AA | Lc -36.3 | 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
#F3F7F4
oklch(97.2% 0.006 153.8)
-
Step 100
100
#E4ECE6
oklch(93.5% 0.012 153.7)
-
Step 200
200
#CEDED3
oklch(88.5% 0.023 155.9)
-
Step 300
300
#ADC9B6
oklch(81% 0.04 155.7)
-
Step 400
400
#80AD90
oklch(70.7% 0.064 156.1)
-
Step 500
500 (this color)
#558F6B
oklch(60% 0.083 155.7)
-
Step 600
600
#43835D
oklch(55.6% 0.089 155.9)
-
Step 700
700
#346F4C
oklch(49.2% 0.084 155.5)
-
Step 800
800
#2C5A3F
oklch(42.7% 0.068 156.2)
-
Step 900
900
#284A35
oklch(37.6% 0.054 155.6)
-
Step 950
950
#182B1F
oklch(26.8% 0.034 155.7)
#558F6B 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) | #8F8769 | 0.076 |
| Deuteranopia (no green cones) | #85806D | 0.073 |
| Tritanopia (no blue cones) | #498E85 | 0.040 |
| Achromatopsia (no color) | #838383 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558F6B
#558F6B
oklch(60% 0.083 155.7)
- #9F6D93
#9F6D93
oklch(59.9% 0.082 335.6)
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 #558F6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.019
- Ocean Green #3D9973 ΔE 0.031
- Dark Sage #598556 ΔE 0.034
- Light Forest Green #4F9153 ΔE 0.037
- Dusty Teal #4C9085 ΔE 0.037
- Viridian #1E9167 ΔE 0.040
- Green Grey #77926F ΔE 0.043
- Sea Green #2E8B57 ΔE 0.048
Use #558F6B 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.