#31900A
Closest named color: Emerald Green (#028F1E). oklch(57.5% 0.179 139.6), rgb(49, 144, 10).
Aa
Black text reads best on this color (5.12:1).
About this color
#31900A is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.179 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald Green (#028F1E), ΔE 0.018 away. Black text reads best on it, at 5.12:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.179) |
| Temperature | in between |
| Nearest name | Emerald Green (#028F1E) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #31900A |
| RGB | rgb(49, 144, 10) |
| HSL | hsl(103, 87%, 30%) |
| OKLCH | oklch(57.5% 0.179 139.6) |
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 #31900A | 4.09:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #31900A | 5.12:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #31900A text on white | 4.09:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #31900A text on black | 5.12:1 | AA | Lc -34.0 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDF
oklch(93.6% 0.024 139.4)
-
Step 200
200
#CAE1C5
oklch(88.5% 0.045 140.1)
-
Step 300
300
#A6CE9C
oklch(81% 0.081 139.4)
-
Step 400
400
#74B464
oklch(70.7% 0.129 139.5)
-
Step 500
500
#4CA035
oklch(63.1% 0.165 139.6)
-
Step 600
600 (this color)
#31900A
oklch(57.5% 0.179 139.6)
-
Step 700
700
#237400
oklch(49% 0.157 139.6)
-
Step 800
800
#1C5F00
oklch(42.6% 0.136 139.5)
-
Step 900
900
#1D4E0E
oklch(37.6% 0.107 139.5)
-
Step 950
950
#122E0B
oklch(27% 0.068 139.8)
#31900A 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) | #948200 | 0.120 |
| Deuteranopia (no green cones) | #897A20 | 0.119 |
| Tritanopia (no blue cones) | #238B7A | 0.122 |
| Achromatopsia (no color) | #7D7D7D | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31900A
#31900A
oklch(57.5% 0.179 139.6)
- #A54DBA
#A54DBA
oklch(57.5% 0.18 319.5)
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 #31900A, closest first.
No curated palette has a color within ΔE 0.04 of #31900A.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald Green #028F1E ΔE 0.018
- True Green #089404 ΔE 0.018
- Irish Green #019529 ΔE 0.020
- Forest Green #228B22 ΔE 0.022
- Kelley Green #009337 ΔE 0.027
- Grass Green #3F9B0B ΔE 0.036
- Grassy Green #419C03 ΔE 0.039
- Sap Green #5C8B15 ΔE 0.041
Use #31900A 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.