#40D59C
Closest named color: Emerald (#06D6A0). oklch(78.1% 0.15 163.1), rgb(64, 213, 156).
Aa
Black text reads best on this color (11.21:1).
About this color
#40D59C is a light, vivid green. In OKLCH its lightness is 78%, its chroma 0.150 and its hue 163°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.014 away. Black text reads best on it, at 11.21:1.
| Hue family | Greens |
| Lightness | light (78%) |
| Chroma | vivid (0.150) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 11.21:1 |
| White text | 1.87:1 |
Values
| HEX | #40D59C |
| RGB | rgb(64, 213, 156) |
| HSL | hsl(157, 64%, 54%) |
| OKLCH | oklch(78.1% 0.15 163.1) |
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 #40D59C | 1.87:1 | Fails | Lc -39.2 | Non-text elements, placeholder text |
| Black text on #40D59C | 11.21:1 | AAA | Lc 68.9 | Content text, not long reading |
| #40D59C text on white | 1.87:1 | Fails | Lc 35.0 | Non-text elements, placeholder text |
| #40D59C text on black | 11.21:1 | AAA | Lc -67.5 | 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
#D1F4E2
oklch(93.7% 0.044 163.1)
-
Step 200
200
#A6EBCA
oklch(88.5% 0.083 163.4)
-
Step 300
300 (this color)
#40D59C
oklch(78.1% 0.15 163.1)
-
Step 400
400
#00BD85
oklch(70.6% 0.152 163.2)
-
Step 500
500
#00A271
oklch(63% 0.136 163)
-
Step 600
600
#00895F
oklch(55.7% 0.12 163.1)
-
Step 700
700
#00734F
oklch(49.1% 0.106 163)
-
Step 800
800
#005E40
oklch(42.6% 0.092 163.1)
-
Step 900
900
#004F35
oklch(37.8% 0.082 162.9)
-
Step 950
950
#002F1E
oklch(27% 0.058 163)
#40D59C 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) | #D1C699 | 0.144 |
| Deuteranopia (no green cones) | #BEB8A0 | 0.140 |
| Tritanopia (no blue cones) | #00D5C5 | 0.057 |
| Achromatopsia (no color) | #BDBDBD | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D59C
#40D59C
oklch(78.1% 0.15 163.1)
- #F98FD1
#F98FD1
oklch(78.2% 0.15 343.1)
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 #40D59C, closest first.
No curated palette has a color within ΔE 0.04 of #40D59C.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.014
- Aqua Green #12E193 ΔE 0.041
- Medium Aquamarine #66CDAA ΔE 0.042
- Seaweed #18D17B ΔE 0.047
- Greenblue #23C48B ΔE 0.052
- Aqua Marine #2EE8BB ΔE 0.056
- Soft Green #6FC276 ΔE 0.059
- Seafoam Blue #78D1B6 ΔE 0.060
Use #40D59C 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.