#40BD9B
Closest named color: Greeny Blue (#42B395). oklch(72.1% 0.121 171.2), rgb(64, 189, 155).
Aa
Black text reads best on this color (8.97:1).
About this color
#40BD9B is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.121 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.028 away. Black text reads best on it, at 8.97:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.97:1 |
| White text | 2.34:1 |
Values
| HEX | #40BD9B |
| RGB | rgb(64, 189, 155) |
| HSL | hsl(164, 49%, 50%) |
| OKLCH | oklch(72.1% 0.121 171.2) |
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 #40BD9B | 2.34:1 | Fails | Lc -50.7 | Large or bold text, headings |
| Black text on #40BD9B | 8.97:1 | AAA | Lc 58.2 | Large or bold text, headings |
| #40BD9B text on white | 2.34:1 | Fails | Lc 45.8 | Large or bold text, headings |
| #40BD9B text on black | 8.97:1 | AAA | Lc -56.3 | 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
#EFF8F4
oklch(97.1% 0.011 167.8)
-
Step 100
100
#DCEFE8
oklch(93.6% 0.022 171.8)
-
Step 200
200
#BFE3D5
oklch(88.6% 0.042 169.8)
-
Step 300
300
#8ED1BA
oklch(80.9% 0.076 170.9)
-
Step 400
400 (this color)
#40BD9B
oklch(72.1% 0.121 171.2)
-
Step 500
500
#00A180
oklch(63.1% 0.123 171.4)
-
Step 600
600
#00876B
oklch(55.5% 0.108 171.4)
-
Step 700
700
#00725A
oklch(49.2% 0.096 171.5)
-
Step 800
800
#005D49
oklch(42.6% 0.083 171.6)
-
Step 900
900
#004E3C
oklch(37.7% 0.074 170.6)
-
Step 950
950
#002F23
oklch(27.2% 0.053 170.5)
#40BD9B 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) | #B7B199 | 0.123 |
| Deuteranopia (no green cones) | #A6A49D | 0.119 |
| Tritanopia (no blue cones) | #00BFB3 | 0.034 |
| Achromatopsia (no color) | #A9A9A9 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BD9B
#40BD9B
oklch(72.1% 0.121 171.2)
- #DE84AE
#DE84AE
oklch(72.1% 0.121 351.1)
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 #40BD9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.028
- Green Blue #01C08D ΔE 0.032
- Topaz #13BBAF ΔE 0.033
- Greenblue #23C48B ΔE 0.037
- Light Sea Green #20B2AA ΔE 0.047
- Dark Seafoam #1FB57A ΔE 0.051
- Bluey Green #2BB179 ΔE 0.054
- Tea #65AB7C ΔE 0.055
Use #40BD9B 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.