#31CD8A
Closest named color: Seaweed (#18D17B). oklch(75.4% 0.159 159.3), rgb(49, 205, 138).
Aa
Black text reads best on this color (10.23:1).
About this color
#31CD8A is a medium-light, vivid green. In OKLCH its lightness is 75%, its chroma 0.159 and its hue 159°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.027 away. Black text reads best on it, at 10.23:1.
| Hue family | Greens |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.159) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.23:1 |
| White text | 2.05:1 |
Values
| HEX | #31CD8A |
| RGB | rgb(49, 205, 138) |
| HSL | hsl(154, 61%, 50%) |
| OKLCH | oklch(75.4% 0.159 159.3) |
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 #31CD8A | 2.05:1 | Fails | Lc -44.0 | Non-text elements, placeholder text |
| Black text on #31CD8A | 10.23:1 | AAA | Lc 64.4 | Content text, not long reading |
| #31CD8A text on white | 2.05:1 | Fails | Lc 39.5 | Non-text elements, placeholder text |
| #31CD8A text on black | 10.23:1 | AAA | Lc -62.8 | 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
#EEF8F2
oklch(97% 0.013 159.9)
-
Step 100
100
#DAF0E3
oklch(93.5% 0.029 159.9)
-
Step 200
200
#BBE5CC
oklch(88.5% 0.056 158.9)
-
Step 300
300
#86D5AA
oklch(81% 0.1 159.3)
-
Step 400
400 (this color)
#31CD8A
oklch(75.4% 0.159 159.3)
-
Step 500
500
#00A369
oklch(63.1% 0.144 159.3)
-
Step 600
600
#008958
oklch(55.6% 0.127 159.5)
-
Step 700
700
#007349
oklch(49% 0.112 159.4)
-
Step 800
800
#005F3B
oklch(42.8% 0.098 159.1)
-
Step 900
900
#004F31
oklch(37.7% 0.086 159.7)
-
Step 950
950
#002F1B
oklch(26.9% 0.062 159.3)
#31CD8A 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) | #CBBD86 | 0.149 |
| Deuteranopia (no green cones) | #B8AF8E | 0.146 |
| Tritanopia (no blue cones) | #00CCBB | 0.068 |
| Achromatopsia (no color) | #B5B5B5 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31CD8A
#31CD8A
oklch(75.4% 0.159 159.3)
- #F084D0
#F084D0
oklch(75.5% 0.16 339.4)
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 #31CD8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.027
- Greenblue #23C48B ΔE 0.028
- Emerald #06D6A0 ΔE 0.031
- Dark Mint #48C072 ΔE 0.039
- Algae Green #21C36F ΔE 0.040
- Green Blue #01C08D ΔE 0.043
- Dark Mint Green #20C073 ΔE 0.043
- Soft Green #6FC276 ΔE 0.044
Use #31CD8A 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.