#40C187
Closest named color: Greenblue (#23C48B). oklch(72.6% 0.141 159.9), rgb(64, 193, 135).
Aa
Black text reads best on this color (9.19:1).
About this color
#40C187 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.141 and its hue 160°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greenblue (#23C48B), ΔE 0.012 away. Black text reads best on it, at 9.19:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.141) |
| Temperature | in between |
| Nearest name | Greenblue (#23C48B) |
| Black text | 9.19:1 |
| White text | 2.28:1 |
Values
| HEX | #40C187 |
| RGB | rgb(64, 193, 135) |
| HSL | hsl(153, 51%, 50%) |
| OKLCH | oklch(72.6% 0.141 159.9) |
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 #40C187 | 2.28:1 | Fails | Lc -49.5 | Large or bold text, headings |
| Black text on #40C187 | 9.19:1 | AAA | Lc 59.3 | Large or bold text, headings |
| #40C187 text on white | 2.28:1 | Fails | Lc 44.7 | Non-text elements, placeholder text |
| #40C187 text on black | 9.19:1 | AAA | Lc -57.5 | Large or bold text, headings |
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
#EFF8F3
oklch(97.1% 0.012 162.1)
-
Step 100
100
#DCEFE4
oklch(93.5% 0.025 160.6)
-
Step 200
200
#BEE4CE
oklch(88.6% 0.05 159.8)
-
Step 300
300
#8DD3AD
oklch(81% 0.089 159.8)
-
Step 400
400 (this color)
#40C187
oklch(72.6% 0.141 159.9)
-
Step 500
500
#00A36A
oklch(63.1% 0.143 159.7)
-
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)
#40C187 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) | #BFB384 | 0.133 |
| Deuteranopia (no green cones) | #AEA78B | 0.129 |
| Tritanopia (no blue cones) | #00C0B2 | 0.061 |
| Achromatopsia (no color) | #ABABAB | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40C187
#40C187
oklch(72.6% 0.141 159.9)
- #E081C2
#E081C2
oklch(72.6% 0.141 340)
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 #40C187, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greenblue #23C48B ΔE 0.012
- Green Blue #01C08D ΔE 0.019
- Dark Mint #48C072 ΔE 0.026
- Dark Mint Green #20C073 ΔE 0.032
- Algae Green #21C36F ΔE 0.038
- Soft Green #6FC276 ΔE 0.038
- Dark Seafoam #1FB57A ΔE 0.041
- Medium Sea Green #3CB371 ΔE 0.044
Use #40C187 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.