#55B133
Closest named color: Grass (#5CAC2D). oklch(67.9% 0.183 138.7), rgb(85, 177, 51).
Aa
Black text reads best on this color (7.72:1).
About this color
#55B133 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.183 and its hue 139°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.014 away. Black text reads best on it, at 7.72:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.183) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.72:1 |
| White text | 2.71:1 |
Values
| HEX | #55B133 |
| RGB | rgb(85, 177, 51) |
| HSL | hsl(104, 55%, 45%) |
| OKLCH | oklch(67.9% 0.183 138.7) |
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 #55B133 | 2.71:1 | Fails | Lc -57.6 | Large or bold text, headings |
| Black text on #55B133 | 7.72:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #55B133 text on white | 2.71:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #55B133 text on black | 7.72:1 | AAA | Lc -49.5 | 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
#F0F8EE
oklch(97% 0.016 139.4)
-
Step 100
100
#DFF0DA
oklch(93.7% 0.034 138.6)
-
Step 200
200
#C5E4BB
oklch(88.6% 0.064 138.1)
-
Step 300
300
#9BD38A
oklch(81% 0.115 138.6)
-
Step 400
400 (this color)
#55B133
oklch(67.9% 0.183 138.7)
-
Step 500
500
#3DA300
oklch(63% 0.197 138.7)
-
Step 600
600
#328900
oklch(55.5% 0.174 138.7)
-
Step 700
700
#297400
oklch(49.2% 0.154 138.7)
-
Step 800
800
#205F00
oklch(42.8% 0.134 138.7)
-
Step 900
900
#194F00
oklch(37.7% 0.118 138.8)
-
Step 950
950
#0C2F00
oklch(26.9% 0.084 138.6)
#55B133 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) | #B6A21E | 0.119 |
| Deuteranopia (no green cones) | #AA9A3F | 0.120 |
| Tritanopia (no blue cones) | #4DAB98 | 0.126 |
| Achromatopsia (no color) | #9D9D9D | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55B133
#55B133
oklch(67.9% 0.183 138.7)
- #C66DDF
#C66DDF
oklch(67.8% 0.183 318.5)
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 #55B133, closest first.
No curated palette has a color within ΔE 0.04 of #55B133.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.014
- Leafy Green #51B73B ΔE 0.016
- Leaf Green #5CA904 ΔE 0.025
- Medium Green #39AD48 ΔE 0.029
- Leaf #71AA34 ΔE 0.032
- Shamrock #01B44C ΔE 0.034
- Dark Pastel Green #56AE57 ΔE 0.037
- Mid Green #50A747 ΔE 0.038
Use #55B133 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.