#31BF66
Closest named color: Algae Green (#21C36F). oklch(71.1% 0.174 151), rgb(49, 191, 102).
Aa
Black text reads best on this color (8.77:1).
About this color
#31BF66 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.174 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.013 away. Black text reads best on it, at 8.77:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.174) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 8.77:1 |
| White text | 2.39:1 |
Values
| HEX | #31BF66 |
| RGB | rgb(49, 191, 102) |
| HSL | hsl(142, 59%, 47%) |
| OKLCH | oklch(71.1% 0.174 151) |
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 #31BF66 | 2.39:1 | Fails | Lc -51.6 | Large or bold text, headings |
| Black text on #31BF66 | 8.77:1 | AAA | Lc 57.3 | Large or bold text, headings |
| #31BF66 text on white | 2.39:1 | Fails | Lc 46.7 | Large or bold text, headings |
| #31BF66 text on black | 8.77:1 | AAA | Lc -55.4 | 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
#EFF8F1
oklch(97% 0.013 152.6)
-
Step 100
100
#DCF0DF
oklch(93.6% 0.031 149.8)
-
Step 200
200
#BDE5C5
oklch(88.5% 0.06 150.9)
-
Step 300
300
#8BD59D
oklch(81% 0.108 151.1)
-
Step 400
400 (this color)
#31BF66
oklch(71.1% 0.174 151)
-
Step 500
500
#00A550
oklch(63.2% 0.17 151.1)
-
Step 600
600
#008B42
oklch(55.7% 0.15 151)
-
Step 700
700
#007536
oklch(49.2% 0.133 150.8)
-
Step 800
800
#00602B
oklch(42.8% 0.116 150.8)
-
Step 900
900
#005023
oklch(37.7% 0.102 150.9)
-
Step 950
950
#003012
oklch(27% 0.073 150.7)
#31BF66 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) | #C0AF5F | 0.145 |
| Deuteranopia (no green cones) | #AFA36C | 0.143 |
| Tritanopia (no blue cones) | #00BCAA | 0.094 |
| Achromatopsia (no color) | #A7A7A7 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31BF66
#31BF66
oklch(71.1% 0.174 151)
- #DD74D3
#DD74D3
oklch(71% 0.174 330.9)
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 #31BF66, closest first.
No curated palette has a color within ΔE 0.04 of #31BF66.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.013
- Dark Mint Green #20C073 ΔE 0.015
- Cool Green #33B864 ΔE 0.020
- Dark Mint #48C072 ΔE 0.021
- Shamrock Green #02C14D ΔE 0.033
- Leafy Green #51B73B ΔE 0.040
- Medium Sea Green #3CB371 ΔE 0.042
- Green Teal #0CB577 ΔE 0.043
Use #31BF66 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.