#40CD9C
Closest named color: Emerald (#06D6A0). oklch(76.1% 0.14 165.5), rgb(64, 205, 156).
Aa
Black text reads best on this color (10.43:1).
About this color
#40CD9C is a medium-light, moderately saturated green. In OKLCH its lightness is 76%, its chroma 0.140 and its hue 166°. 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 10.43:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.140) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 10.43:1 |
| White text | 2.01:1 |
Values
| HEX | #40CD9C |
| RGB | rgb(64, 205, 156) |
| HSL | hsl(159, 59%, 53%) |
| OKLCH | oklch(76.1% 0.14 165.5) |
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 #40CD9C | 2.01:1 | Fails | Lc -43.1 | Non-text elements, placeholder text |
| Black text on #40CD9C | 10.43:1 | AAA | Lc 65.2 | Content text, not long reading |
| #40CD9C text on white | 2.01:1 | Fails | Lc 38.7 | Non-text elements, placeholder text |
| #40CD9C text on black | 10.43:1 | AAA | Lc -63.7 | 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
#EBFAF2
oklch(97.2% 0.019 162.9)
-
Step 100
100
#D2F3E3
oklch(93.6% 0.041 164.7)
-
Step 200
200
#A8EACD
oklch(88.5% 0.078 165.7)
-
Step 300
300 (this color)
#40CD9C
oklch(76.1% 0.14 165.5)
-
Step 400
400
#00BD8A
oklch(70.8% 0.148 165.3)
-
Step 500
500
#00A276
oklch(63.1% 0.132 165.5)
-
Step 600
600
#008863
oklch(55.6% 0.116 165.8)
-
Step 700
700
#007352
oklch(49.2% 0.104 164.9)
-
Step 800
800
#005E43
oklch(42.7% 0.089 165.5)
-
Step 900
900
#004E37
oklch(37.6% 0.079 165.5)
-
Step 950
950
#002F20
oklch(27.1% 0.056 165.8)
#40CD9C 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) | #C9BF99 | 0.138 |
| Deuteranopia (no green cones) | #B6B19F | 0.134 |
| Tritanopia (no blue cones) | #00CDBF | 0.049 |
| Achromatopsia (no color) | #B7B7B7 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CD9C
#40CD9C
oklch(76.1% 0.14 165.5)
- #F08BC5
#F08BC5
oklch(76.1% 0.14 345.5)
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 #40CD9C, closest first.
No curated palette has a color within ΔE 0.04 of #40CD9C.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.026
- Medium Aquamarine #66CDAA ΔE 0.034
- Greenblue #23C48B ΔE 0.035
- Green Blue #01C08D ΔE 0.046
- Soft Green #6FC276 ΔE 0.051
- Seaweed #18D17B ΔE 0.052
- Dark Mint #48C072 ΔE 0.056
- Seafoam Blue #78D1B6 ΔE 0.059
Use #40CD9C 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.