#31B452
Closest named color: Shamrock (#01B44C). oklch(67.9% 0.178 147.6), rgb(49, 180, 82).
Aa
Black text reads best on this color (7.78:1).
About this color
#31B452 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.178 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.015 away. Black text reads best on it, at 7.78:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.178) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.78:1 |
| White text | 2.69:1 |
Values
| HEX | #31B452 |
| RGB | rgb(49, 180, 82) |
| HSL | hsl(135, 57%, 45%) |
| OKLCH | oklch(67.9% 0.178 147.6) |
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 #31B452 | 2.69:1 | Fails | Lc -57.1 | Large or bold text, headings |
| Black text on #31B452 | 7.78:1 | AAA | Lc 52.1 | Large or bold text, headings |
| #31B452 text on white | 2.69:1 | Fails | Lc 51.9 | Large or bold text, headings |
| #31B452 text on black | 7.78:1 | AAA | Lc -50.0 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DCF0DE
oklch(93.5% 0.032 148.2)
-
Step 200
200
#BFE5C2
oklch(88.5% 0.062 147.2)
-
Step 300
300
#8ED497
oklch(80.8% 0.111 147.7)
-
Step 400
400 (this color)
#31B452
oklch(67.9% 0.178 147.6)
-
Step 500
500
#00A63F
oklch(63.2% 0.185 147.5)
-
Step 600
600
#008B34
oklch(55.5% 0.162 147.6)
-
Step 700
700
#00752B
oklch(49% 0.143 147.8)
-
Step 800
800
#006021
oklch(42.6% 0.125 147.5)
-
Step 900
900
#00501B
oklch(37.6% 0.109 147.8)
-
Step 950
950
#00300D
oklch(27% 0.078 147.8)
#31B452 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) | #B6A449 | 0.140 |
| Deuteranopia (no green cones) | #A79959 | 0.139 |
| Tritanopia (no blue cones) | #00B09E | 0.104 |
| Achromatopsia (no color) | #9D9D9D | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31B452
#31B452
oklch(67.9% 0.178 147.6)
- #D06ACF
#D06ACF
oklch(67.8% 0.178 327.7)
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 #31B452, closest first.
No curated palette has a color within ΔE 0.04 of #31B452.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.015
- Medium Green #39AD48 ΔE 0.020
- Cool Green #33B864 ΔE 0.021
- Leafy Green #51B73B ΔE 0.029
- Dark Pastel Green #56AE57 ΔE 0.030
- Jade Green #2BAF6A ΔE 0.035
- Grass #5CAC2D ΔE 0.036
- Mid Green #50A747 ΔE 0.037
Use #31B452 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.