#03B840
Closest named color: Shamrock (#01B44C). oklch(68.2% 0.205 146.5), rgb(3, 184, 64).
Aa
Black text reads best on this color (7.93:1).
About this color
#03B840 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.205 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.018 away. Black text reads best on it, at 7.93:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.205) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.93:1 |
| White text | 2.64:1 |
Values
| HEX | #03B840 |
| RGB | rgb(3, 184, 64) |
| HSL | hsl(140, 97%, 37%) |
| OKLCH | oklch(68.2% 0.205 146.5) |
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 #03B840 | 2.64:1 | Fails | Lc -55.9 | Large or bold text, headings |
| Black text on #03B840 | 7.93:1 | AAA | Lc 53.3 | Large or bold text, headings |
| #03B840 text on white | 2.64:1 | Fails | Lc 50.8 | Large or bold text, headings |
| #03B840 text on black | 7.93:1 | AAA | Lc -51.2 | 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
#EEF9EF
oklch(97.1% 0.018 148.1)
-
Step 100
100
#DBF1DC
oklch(93.6% 0.036 146.5)
-
Step 200
200
#BBE6BE
oklch(88.4% 0.07 146.8)
-
Step 300
300
#87D78F
oklch(80.9% 0.128 146.6)
-
Step 400
400 (this color)
#03B840
oklch(68.2% 0.205 146.5)
-
Step 500
500
#00A638
oklch(63.1% 0.19 146.5)
-
Step 600
600
#008C2E
oklch(55.7% 0.168 146.5)
-
Step 700
700
#007525
oklch(49% 0.148 146.5)
-
Step 800
800
#00601D
oklch(42.6% 0.128 146.5)
-
Step 900
900
#005017
oklch(37.6% 0.113 146.6)
-
Step 950
950
#00300A
oklch(26.9% 0.081 146.4)
#03B840 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) | #BBA631 | 0.157 |
| Deuteranopia (no green cones) | #AA9A4B | 0.157 |
| Tritanopia (no blue cones) | #00B49F | 0.123 |
| Achromatopsia (no color) | #9F9F9F | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03B840
#03B840
oklch(68.2% 0.205 146.5)
- #D762DA
#D762DA
oklch(68.2% 0.205 326.6)
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 #03B840, closest first.
No curated palette has a color within ΔE 0.04 of #03B840.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.018
- Shamrock Green #02C14D ΔE 0.026
- Leafy Green #51B73B ΔE 0.030
- Medium Green #39AD48 ΔE 0.037
- Kelly Green #02AB2E ΔE 0.038
- Cool Green #33B864 ΔE 0.043
- Frog Green #58BC08 ΔE 0.044
- Grass #5CAC2D ΔE 0.045
Use #03B840 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.