#558B75
Closest named color: Slate Green (#658D6D). oklch(59.2% 0.067 166.4), rgb(85, 139, 117).
Aa
Black text reads best on this color (5.33:1).
About this color
#558B75 is a medium-dark, muted green. In OKLCH its lightness is 59%, its chroma 0.067 and its hue 166°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.022 away. Black text reads best on it, at 5.33:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.067) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #558B75 |
| RGB | rgb(85, 139, 117) |
| HSL | hsl(156, 24%, 44%) |
| OKLCH | oklch(59.2% 0.067 166.4) |
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 #558B75 | 3.93:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #558B75 | 5.33:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #558B75 text on white | 3.93:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #558B75 text on black | 5.33:1 | AA | Lc -35.0 | 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 600.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5ECE8
oklch(93.7% 0.009 161.3)
-
Step 200
200
#CFDDD7
oklch(88.5% 0.017 168.4)
-
Step 300
300
#AFC7BC
oklch(80.8% 0.03 166.3)
-
Step 400
400
#84AB9A
oklch(70.8% 0.049 166.5)
-
Step 500
500
#649681
oklch(63.1% 0.063 166.3)
-
Step 600
600 (this color)
#558B75
oklch(59.2% 0.067 166.4)
-
Step 700
700
#3B6C59
oklch(49.1% 0.062 166.9)
-
Step 800
800
#315849
oklch(42.6% 0.051 167.3)
-
Step 900
900
#2C493D
oklch(37.8% 0.041 166.3)
-
Step 950
950
#1A2B24
oklch(27.1% 0.026 166.8)
#558B75 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) | #898474 | 0.068 |
| Deuteranopia (no green cones) | #807E76 | 0.064 |
| Tritanopia (no blue cones) | #478B85 | 0.026 |
| Achromatopsia (no color) | #808080 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558B75
#558B75
oklch(59.2% 0.067 166.4)
- #9C6E86
#9C6E86
oklch(59.3% 0.067 346.7)
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 #558B75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.022
- Dusty Teal #4C9085 ΔE 0.023
- Dark Sage #598556 ΔE 0.041
- Ocean Green #3D9973 ΔE 0.046
- Green Grey #77926F ΔE 0.048
- Sea #3C9992 ΔE 0.049
- Grey Teal #5E9B8A ΔE 0.051
- Viridian #1E9167 ΔE 0.052
Use #558B75 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.