#55B259
Closest named color: Dark Pastel Green (#56AE57). oklch(68.6% 0.154 144.5), rgb(85, 178, 89).
Aa
Black text reads best on this color (7.89:1).
About this color
#55B259 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.154 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.011 away. Black text reads best on it, at 7.89:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.154) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.89:1 |
| White text | 2.65:1 |
Values
| HEX | #55B259 |
| RGB | rgb(85, 178, 89) |
| HSL | hsl(123, 38%, 52%) |
| OKLCH | oklch(68.6% 0.154 144.5) |
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 #55B259 | 2.65:1 | Fails | Lc -56.6 | Large or bold text, headings |
| Black text on #55B259 | 7.89:1 | AAA | Lc 52.6 | Large or bold text, headings |
| #55B259 text on white | 2.65:1 | Fails | Lc 51.5 | Large or bold text, headings |
| #55B259 text on black | 7.89:1 | AAA | Lc -50.4 | 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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DFEFDF
oklch(93.6% 0.027 145.4)
-
Step 200
200
#C4E3C4
oklch(88.5% 0.053 145.1)
-
Step 300
300
#9AD19A
oklch(80.8% 0.095 144.6)
-
Step 400
400 (this color)
#55B259
oklch(68.6% 0.154 144.5)
-
Step 500
500
#11A62B
oklch(63.1% 0.197 144.4)
-
Step 600
600
#008C1F
oklch(55.6% 0.178 144.4)
-
Step 700
700
#007619
oklch(49.1% 0.157 144.5)
-
Step 800
800
#006113
oklch(42.8% 0.136 144.5)
-
Step 900
900
#00510E
oklch(37.8% 0.121 144.5)
-
Step 950
950
#033008
oklch(27% 0.082 144.6)
#55B259 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) | #B5A451 | 0.116 |
| Deuteranopia (no green cones) | #A89B5F | 0.115 |
| Tritanopia (no blue cones) | #46AE9D | 0.094 |
| Achromatopsia (no color) | #9F9F9F | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55B259
#55B259
oklch(68.6% 0.154 144.5)
- #C876CF
#C876CF
oklch(68.6% 0.154 324.2)
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 #55B259, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.011
- Boring Green #63B365 ΔE 0.020
- Cool Green #33B864 ΔE 0.023
- Fern #63A950 ΔE 0.025
- Algae #54AC68 ΔE 0.029
- Medium Sea Green #3CB371 ΔE 0.029
- Medium Green #39AD48 ΔE 0.032
- Jade Green #2BAF6A ΔE 0.033
Use #55B259 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.