#1FAC31
Closest named color: Kelly Green (#02AB2E). oklch(65% 0.198 144.3), rgb(31, 172, 49).
Aa
Black text reads best on this color (7.00:1).
About this color
#1FAC31 is a medium-light, vivid green. In OKLCH its lightness is 65%, its chroma 0.198 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Kelly Green (#02AB2E), ΔE 0.008 away. Black text reads best on it, at 7.00:1.
| Hue family | Greens |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.198) |
| Temperature | in between |
| Nearest name | Kelly Green (#02AB2E) |
| Black text | 7.00:1 |
| White text | 2.99:1 |
Values
| HEX | #1FAC31 |
| RGB | rgb(31, 172, 49) |
| HSL | hsl(128, 69%, 40%) |
| OKLCH | oklch(65% 0.198 144.3) |
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 #1FAC31 | 2.99:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #1FAC31 | 7.00:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #1FAC31 text on white | 2.99:1 | Fails | Lc 56.0 | Large or bold text, headings |
| #1FAC31 text on black | 7.00:1 | AAA | Lc -45.7 | 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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DFEFDE
oklch(93.6% 0.028 143.7)
-
Step 200
200
#C4E3C3
oklch(88.5% 0.054 144.3)
-
Step 300
300
#9AD199
oklch(80.8% 0.096 144.2)
-
Step 400
400
#5CB95F
oklch(70.7% 0.155 144.3)
-
Step 500
500 (this color)
#1FAC31
oklch(65% 0.198 144.3)
-
Step 600
600
#008C1D
oklch(55.6% 0.179 144.2)
-
Step 700
700
#007617
oklch(49.1% 0.158 144.3)
-
Step 800
800
#006111
oklch(42.8% 0.138 144.2)
-
Step 900
900
#00510D
oklch(37.8% 0.121 144.3)
-
Step 950
950
#043008
oklch(27% 0.081 144.3)
#1FAC31 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 | 0.144 |
| Deuteranopia (no green cones) | #A0913D | 0.144 |
| Tritanopia (no blue cones) | #00A794 | 0.125 |
| Achromatopsia (no color) | #959595 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1FAC31
#1FAC31
oklch(65% 0.198 144.3)
- #C85CD1
#C85CD1
oklch(65.1% 0.197 324.5)
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 #1FAC31, closest first.
No curated palette has a color within ΔE 0.04 of #1FAC31.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Kelly Green #02AB2E ΔE 0.008
- Medium Green #39AD48 ΔE 0.026
- Shamrock #01B44C ΔE 0.027
- Leaf Green #5CA904 ΔE 0.036
- Grass #5CAC2D ΔE 0.037
- Mid Green #50A747 ΔE 0.041
- Grassy Green #419C03 ΔE 0.044
- Leafy Green #51B73B ΔE 0.046
Use #1FAC31 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.