#31D39B
Closest named color: Emerald (#06D6A0). oklch(77.3% 0.153 164.2), rgb(49, 211, 155).
Aa
Black text reads best on this color (10.92:1).
About this color
#31D39B is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.153 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.010 away. Black text reads best on it, at 10.92:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.153) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 10.92:1 |
| White text | 1.92:1 |
Values
| HEX | #31D39B |
| RGB | rgb(49, 211, 155) |
| HSL | hsl(159, 65%, 51%) |
| OKLCH | oklch(77.3% 0.153 164.2) |
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 #31D39B | 1.92:1 | Fails | Lc -40.6 | Non-text elements, placeholder text |
| Black text on #31D39B | 10.92:1 | AAA | Lc 67.6 | Content text, not long reading |
| #31D39B text on white | 1.92:1 | Fails | Lc 36.3 | Non-text elements, placeholder text |
| #31D39B text on black | 10.92:1 | AAA | Lc -66.2 | Content text, not long reading |
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 300.
-
Step 50
50
#EAFAF2
oklch(97.1% 0.02 164.6)
-
Step 100
100
#D0F4E2
oklch(93.6% 0.045 163.8)
-
Step 200
200
#A4EBCA
oklch(88.4% 0.085 164.1)
-
Step 300
300 (this color)
#31D39B
oklch(77.3% 0.153 164.2)
-
Step 400
400
#00BD87
oklch(70.7% 0.15 164.1)
-
Step 500
500
#00A274
oklch(63.1% 0.134 164.5)
-
Step 600
600
#008861
oklch(55.5% 0.117 164.6)
-
Step 700
700
#007351
oklch(49.2% 0.104 164.3)
-
Step 800
800
#005E41
oklch(42.7% 0.091 163.9)
-
Step 900
900
#004F36
oklch(37.9% 0.081 163.8)
-
Step 950
950
#002F1F
oklch(27% 0.057 164.4)
#31D39B 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) | #CFC398 | 0.150 |
| Deuteranopia (no green cones) | #BBB59F | 0.145 |
| Tritanopia (no blue cones) | #00D3C4 | 0.057 |
| Achromatopsia (no color) | #BBBBBB | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31D39B
#31D39B
oklch(77.3% 0.153 164.2)
- #F88BCD
#F88BCD
oklch(77.4% 0.153 344.1)
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 #31D39B, closest first.
No curated palette has a color within ΔE 0.04 of #31D39B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.010
- Seaweed #18D17B ΔE 0.043
- Medium Aquamarine #66CDAA ΔE 0.044
- Greenblue #23C48B ΔE 0.044
- Aqua Green #12E193 ΔE 0.045
- Green Blue #01C08D ΔE 0.057
- Soft Green #6FC276 ΔE 0.058
- Dark Mint #48C072 ΔE 0.062
Use #31D39B 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.