#1BB34C
Closest named color: Shamrock (#01B44C). oklch(67.1% 0.187 148), rgb(27, 179, 76).
Aa
Black text reads best on this color (7.59:1).
About this color
#1BB34C is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.187 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.005 away. Black text reads best on it, at 7.59:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.187) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.59:1 |
| White text | 2.76:1 |
Values
| HEX | #1BB34C |
| RGB | rgb(27, 179, 76) |
| HSL | hsl(139, 74%, 40%) |
| OKLCH | oklch(67.1% 0.187 148) |
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 #1BB34C | 2.76:1 | Fails | Lc -58.0 | Large or bold text, headings |
| Black text on #1BB34C | 7.59:1 | AAA | Lc 51.3 | Large or bold text, headings |
| #1BB34C text on white | 2.76:1 | Fails | Lc 52.7 | Large or bold text, headings |
| #1BB34C text on black | 7.59:1 | AAA | Lc -49.1 | 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
#EFF9F0
oklch(97.2% 0.016 148.4)
-
Step 100
100
#DBF1DD
oklch(93.7% 0.035 147.9)
-
Step 200
200
#BDE6C1
oklch(88.6% 0.066 147.7)
-
Step 300
300
#8BD695
oklch(81% 0.118 147.7)
-
Step 400
400 (this color)
#1BB34C
oklch(67.1% 0.187 148)
-
Step 500
500
#00A542
oklch(63% 0.182 148.1)
-
Step 600
600
#008B36
oklch(55.5% 0.161 148.1)
-
Step 700
700
#00752C
oklch(49% 0.142 148)
-
Step 800
800
#006023
oklch(42.7% 0.123 148.1)
-
Step 900
900
#00501C
oklch(37.6% 0.109 148.1)
-
Step 950
950
#00300D
oklch(27% 0.078 147.8)
#1BB34C 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) | #B5A242 | 0.148 |
| Deuteranopia (no green cones) | #A59754 | 0.147 |
| Tritanopia (no blue cones) | #00AF9C | 0.109 |
| Achromatopsia (no color) | #9B9B9B | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BB34C
#1BB34C
oklch(67.1% 0.187 148)
- #D065CF
#D065CF
oklch(67.2% 0.186 327.8)
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 #1BB34C, closest first.
No curated palette has a color within ΔE 0.04 of #1BB34C.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.005
- Medium Green #39AD48 ΔE 0.018
- Cool Green #33B864 ΔE 0.031
- Kelly Green #02AB2E ΔE 0.033
- Leafy Green #51B73B ΔE 0.033
- Grass #5CAC2D ΔE 0.038
- Dark Pastel Green #56AE57 ΔE 0.039
- Mid Green #50A747 ΔE 0.039
Use #1BB34C 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.