#55AA31
Closest named color: Grass (#5CAC2D). oklch(66% 0.176 138), rgb(85, 170, 49).
Aa
Black text reads best on this color (7.18:1).
About this color
#55AA31 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.176 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.010 away. Black text reads best on it, at 7.18:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.18:1 |
| White text | 2.92:1 |
Values
| HEX | #55AA31 |
| RGB | rgb(85, 170, 49) |
| HSL | hsl(102, 55%, 43%) |
| OKLCH | oklch(66% 0.176 138) |
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 #55AA31 | 2.92:1 | Fails | Lc -60.7 | Content text, not long reading |
| Black text on #55AA31 | 7.18:1 | AAA | Lc 48.7 | Large or bold text, headings |
| #55AA31 text on white | 2.92:1 | Fails | Lc 55.4 | Large or bold text, headings |
| #55AA31 text on black | 7.18:1 | AAA | Lc -46.4 | 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 500.
-
Step 50
50
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDE
oklch(93.6% 0.025 137.8)
-
Step 200
200
#CAE1C3
oklch(88.5% 0.047 138.4)
-
Step 300
300
#A6CE98
oklch(80.9% 0.085 137.7)
-
Step 400
400
#74B45D
oklch(70.6% 0.136 138)
-
Step 500
500 (this color)
#55AA31
oklch(66% 0.176 138)
-
Step 600
600
#368900
oklch(55.6% 0.172 138)
-
Step 700
700
#2C7300
oklch(49.1% 0.152 138.1)
-
Step 800
800
#235E00
oklch(42.6% 0.131 138)
-
Step 900
900
#1D4F02
oklch(37.8% 0.115 138)
-
Step 950
950
#122E06
oklch(26.9% 0.073 137.9)
#55AA31 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) | #AF9B1D | 0.113 |
| Deuteranopia (no green cones) | #A4943D | 0.114 |
| Tritanopia (no blue cones) | #4FA492 | 0.122 |
| Achromatopsia (no color) | #979797 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55AA31
#55AA31
oklch(66% 0.176 138)
- #BE6AD7
#BE6AD7
oklch(66.1% 0.176 318)
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 #55AA31, closest first.
No curated palette has a color within ΔE 0.04 of #55AA31.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.010
- Leaf Green #5CA904 ΔE 0.018
- Medium Green #39AD48 ΔE 0.022
- Mid Green #50A747 ΔE 0.023
- Leaf #71AA34 ΔE 0.029
- Dark Pastel Green #56AE57 ΔE 0.035
- Fern #63A950 ΔE 0.035
- Leafy Green #51B73B ΔE 0.036
Use #55AA31 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.