#40B8BD
Closest named color: Topaz (#13BBAF). oklch(71.9% 0.104 199.1), rgb(64, 184, 189).
Aa
Black text reads best on this color (8.80:1).
About this color
#40B8BD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.104 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.031 away. Black text reads best on it, at 8.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 8.80:1 |
| White text | 2.38:1 |
Values
| HEX | #40B8BD |
| RGB | rgb(64, 184, 189) |
| HSL | hsl(182, 49%, 50%) |
| OKLCH | oklch(71.9% 0.104 199.1) |
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 #40B8BD | 2.38:1 | Fails | Lc -51.6 | Large or bold text, headings |
| Black text on #40B8BD | 8.80:1 | AAA | Lc 57.3 | Large or bold text, headings |
| #40B8BD text on white | 2.38:1 | Fails | Lc 46.7 | Large or bold text, headings |
| #40B8BD text on black | 8.80:1 | AAA | Lc -55.4 | 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
#EFF7F8
oklch(97% 0.009 205.9)
-
Step 100
100
#DCEEEF
oklch(93.6% 0.019 200.9)
-
Step 200
200
#BEE1E2
oklch(88.5% 0.037 198.6)
-
Step 300
300
#8ECED0
oklch(80.9% 0.065 198.4)
-
Step 400
400 (this color)
#40B8BD
oklch(71.9% 0.104 199.1)
-
Step 500
500
#009DA2
oklch(63.2% 0.107 198.8)
-
Step 600
600
#008488
oklch(55.7% 0.095 198.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#40B8BD 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) | #ABB0BE | 0.107 |
| Deuteranopia (no green cones) | #98A2BE | 0.099 |
| Tritanopia (no blue cones) | #00BEB9 | 0.026 |
| Achromatopsia (no color) | #A8A8A8 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B8BD
#40B8BD
oklch(71.9% 0.104 199.1)
- #DE898A
#DE898A
oklch(71.9% 0.104 19.2)
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 #40B8BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.031
- Turquoise Blue #06B1C4 ΔE 0.033
- Light Sea Green #20B2AA ΔE 0.035
- Greeny Blue #42B395 ΔE 0.056
- Dark Turquoise #00CED1 ΔE 0.060
- Medium Turquoise #48D1CC ΔE 0.070
- Greyblue #77A1B5 ΔE 0.072
- Cadet Blue #5F9EA0 ΔE 0.073
Use #40B8BD 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.