#1BB855
Closest named color: Shamrock (#01B44C). oklch(68.6% 0.185 149.3), rgb(27, 184, 85).
Aa
Black text reads best on this color (8.03:1).
About this color
#1BB855 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.185 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.015 away. Black text reads best on it, at 8.03:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.185) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 8.03:1 |
| White text | 2.61:1 |
Values
| HEX | #1BB855 |
| RGB | rgb(27, 184, 85) |
| HSL | hsl(142, 74%, 41%) |
| OKLCH | oklch(68.6% 0.185 149.3) |
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 #1BB855 | 2.61:1 | Fails | Lc -55.5 | Large or bold text, headings |
| Black text on #1BB855 | 8.03:1 | AAA | Lc 53.6 | Large or bold text, headings |
| #1BB855 text on white | 2.61:1 | Fails | Lc 50.4 | Large or bold text, headings |
| #1BB855 text on black | 8.03:1 | AAA | Lc -51.5 | 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
#EFF9F0
oklch(97.2% 0.016 148.4)
-
Step 100
100
#DBF1DE
oklch(93.7% 0.034 149.3)
-
Step 200
200
#BCE6C3
oklch(88.6% 0.065 149.8)
-
Step 300
300
#89D698
oklch(81% 0.116 149.4)
-
Step 400
400 (this color)
#1BB855
oklch(68.6% 0.185 149.3)
-
Step 500
500
#00A548
oklch(63% 0.177 149.3)
-
Step 600
600
#008B3C
oklch(55.6% 0.155 149.4)
-
Step 700
700
#007531
oklch(49.1% 0.138 149.3)
-
Step 800
800
#006027
oklch(42.7% 0.12 149.3)
-
Step 900
900
#00501F
oklch(37.7% 0.106 149.2)
-
Step 950
950
#003010
oklch(27% 0.075 149.4)
#1BB855 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) | #B9A74C | 0.149 |
| Deuteranopia (no green cones) | #A99B5D | 0.150 |
| Tritanopia (no blue cones) | #00B4A2 | 0.106 |
| Achromatopsia (no color) | #A0A0A0 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BB855
#1BB855
oklch(68.6% 0.185 149.3)
- #D669D1
#D669D1
oklch(68.5% 0.185 329.1)
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 #1BB855, closest first.
No curated palette has a color within ΔE 0.04 of #1BB855.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.015
- Cool Green #33B864 ΔE 0.021
- Shamrock Green #02C14D ΔE 0.029
- Leafy Green #51B73B ΔE 0.030
- Medium Green #39AD48 ΔE 0.030
- Dark Mint Green #20C073 ΔE 0.037
- Algae Green #21C36F ΔE 0.038
- Dark Pastel Green #56AE57 ΔE 0.040
Use #1BB855 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.