#31CD91
Closest named color: Emerald (#06D6A0). oklch(75.5% 0.153 161.9), rgb(49, 205, 145).
Aa
Black text reads best on this color (10.27:1).
About this color
#31CD91 is a medium-light, vivid green. In OKLCH its lightness is 76%, its chroma 0.153 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.026 away. Black text reads best on it, at 10.27:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.153) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 10.27:1 |
| White text | 2.04:1 |
Values
| HEX | #31CD91 |
| RGB | rgb(49, 205, 145) |
| HSL | hsl(157, 61%, 50%) |
| OKLCH | oklch(75.5% 0.153 161.9) |
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 #31CD91 | 2.04:1 | Fails | Lc -43.8 | Non-text elements, placeholder text |
| Black text on #31CD91 | 10.27:1 | AAA | Lc 64.6 | Content text, not long reading |
| #31CD91 text on white | 2.04:1 | Fails | Lc 39.3 | Non-text elements, placeholder text |
| #31CD91 text on black | 10.27:1 | AAA | Lc -63.0 | 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 400.
-
Step 50
50
#EEF8F3
oklch(97% 0.012 164.8)
-
Step 100
100
#DAF0E4
oklch(93.6% 0.028 162.1)
-
Step 200
200
#BBE5CE
oklch(88.6% 0.054 161.1)
-
Step 300
300
#86D4AE
oklch(80.9% 0.095 162.1)
-
Step 400
400 (this color)
#31CD91
oklch(75.5% 0.153 161.9)
-
Step 500
500
#00A36F
oklch(63.2% 0.139 161.8)
-
Step 600
600
#00895D
oklch(55.7% 0.122 162)
-
Step 700
700
#00734D
oklch(49.1% 0.108 161.8)
-
Step 800
800
#005E3F
oklch(42.6% 0.093 162.3)
-
Step 900
900
#004F34
oklch(37.8% 0.083 162.1)
-
Step 950
950
#002F1D
oklch(27% 0.059 161.7)
#31CD91 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) | #CABD8D | 0.148 |
| Deuteranopia (no green cones) | #B7B095 | 0.143 |
| Tritanopia (no blue cones) | #00CDBD | 0.061 |
| Achromatopsia (no color) | #B5B5B5 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31CD91
#31CD91
oklch(75.5% 0.153 161.9)
- #F086CB
#F086CB
oklch(75.6% 0.153 341.8)
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 #31CD91, closest first.
No curated palette has a color within ΔE 0.04 of #31CD91.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.026
- Greenblue #23C48B ΔE 0.027
- Seaweed #18D17B ΔE 0.035
- Green Blue #01C08D ΔE 0.041
- Dark Mint #48C072 ΔE 0.044
- Soft Green #6FC276 ΔE 0.046
- Algae Green #21C36F ΔE 0.047
- Dark Mint Green #20C073 ΔE 0.048
Use #31CD91 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.