#55B166
Closest named color: Boring Green (#63B365). oklch(68.5% 0.14 147.9), rgb(85, 177, 102).
Aa
Black text reads best on this color (7.86:1).
About this color
#55B166 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.140 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.014 away. Black text reads best on it, at 7.86:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.140) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 7.86:1 |
| White text | 2.66:1 |
Values
| HEX | #55B166 |
| RGB | rgb(85, 177, 102) |
| HSL | hsl(131, 37%, 51%) |
| OKLCH | oklch(68.5% 0.14 147.9) |
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 #55B166 | 2.66:1 | Fails | Lc -56.8 | Large or bold text, headings |
| Black text on #55B166 | 7.86:1 | AAA | Lc 52.4 | Large or bold text, headings |
| #55B166 text on white | 2.66:1 | Fails | Lc 51.7 | Large or bold text, headings |
| #55B166 text on black | 7.86:1 | AAA | Lc -50.2 | 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
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DFEFE1
oklch(93.6% 0.025 149.1)
-
Step 200
200
#C4E3C7
oklch(88.6% 0.05 147.8)
-
Step 300
300
#9AD1A1
oklch(81% 0.088 148.1)
-
Step 400
400 (this color)
#55B166
oklch(68.5% 0.14 147.9)
-
Step 500
500
#11A543
oklch(63.1% 0.179 147.8)
-
Step 600
600
#008B35
oklch(55.5% 0.161 147.8)
-
Step 700
700
#00752C
oklch(49% 0.142 148)
-
Step 800
800
#006022
oklch(42.6% 0.124 147.8)
-
Step 900
900
#00501B
oklch(37.6% 0.109 147.8)
-
Step 950
950
#03300F
oklch(27.1% 0.075 147.8)
#55B166 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) | #B3A461 | 0.113 |
| Deuteranopia (no green cones) | #A69B6B | 0.111 |
| Tritanopia (no blue cones) | #43AE9F | 0.081 |
| Achromatopsia (no color) | #9E9E9E | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55B166
#55B166
oklch(68.5% 0.14 147.9)
- #C878C6
#C878C6
oklch(68.5% 0.142 327.9)
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 #55B166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.014
- Algae #54AC68 ΔE 0.016
- Dark Pastel Green #56AE57 ΔE 0.017
- Medium Sea Green #3CB371 ΔE 0.018
- Dark Seafoam Green #3EAF76 ΔE 0.026
- Seaweed Green #35AD6B ΔE 0.027
- Jade Green #2BAF6A ΔE 0.027
- Fern #63A950 ΔE 0.027
Use #55B166 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.