#40CF90
Closest named color: Emerald (#06D6A0). oklch(76.3% 0.152 159.9), rgb(64, 207, 144).
Aa
Black text reads best on this color (10.54:1).
About this color
#40CF90 is a medium-light, vivid green. In OKLCH its lightness is 76%, its chroma 0.152 and its hue 160°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.024 away. Black text reads best on it, at 10.54:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.152) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 10.54:1 |
| White text | 1.99:1 |
Values
| HEX | #40CF90 |
| RGB | rgb(64, 207, 144) |
| HSL | hsl(154, 60%, 53%) |
| OKLCH | oklch(76.3% 0.152 159.9) |
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 #40CF90 | 1.99:1 | Fails | Lc -42.5 | Non-text elements, placeholder text |
| Black text on #40CF90 | 10.54:1 | AAA | Lc 65.8 | Content text, not long reading |
| #40CF90 text on white | 1.99:1 | Fails | Lc 38.1 | Non-text elements, placeholder text |
| #40CF90 text on black | 10.54:1 | AAA | Lc -64.3 | 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
#EBFAF1
oklch(97.2% 0.02 159.8)
-
Step 100
100
#D2F3E0
oklch(93.5% 0.043 160.2)
-
Step 200
200
#A8EBC6
oklch(88.5% 0.085 159.9)
-
Step 300
300 (this color)
#40CF90
oklch(76.3% 0.152 159.9)
-
Step 400
400
#00BE7D
oklch(70.7% 0.16 159.9)
-
Step 500
500
#00A36B
oklch(63.1% 0.143 160.1)
-
Step 600
600
#008959
oklch(55.6% 0.126 160)
-
Step 700
700
#00734A
oklch(49% 0.111 160)
-
Step 800
800
#005F3C
oklch(42.8% 0.097 159.8)
-
Step 900
900
#004F31
oklch(37.7% 0.086 159.7)
-
Step 950
950
#002F1C
oklch(26.9% 0.06 160.5)
#40CF90 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) | #CDC08C | 0.143 |
| Deuteranopia (no green cones) | #BAB294 | 0.140 |
| Tritanopia (no blue cones) | #00CEBE | 0.064 |
| Achromatopsia (no color) | #B8B8B8 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CF90
#40CF90
oklch(76.3% 0.152 159.9)
- #F189D0
#F189D0
oklch(76.3% 0.152 340.2)
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 #40CF90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.024
- Seaweed #18D17B ΔE 0.034
- Greenblue #23C48B ΔE 0.035
- Soft Green #6FC276 ΔE 0.044
- Dark Mint #48C072 ΔE 0.048
- Medium Aquamarine #66CDAA ΔE 0.048
- Green Blue #01C08D ΔE 0.050
- Aqua Green #12E193 ΔE 0.050
Use #40CF90 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.