#40BDB6
Closest named color: Topaz (#13BBAF). oklch(72.9% 0.108 189.7), rgb(64, 189, 182).
Aa
Black text reads best on this color (9.17:1).
About this color
#40BDB6 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.108 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.021 away. Black text reads best on it, at 9.17:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.17:1 |
| White text | 2.28:1 |
Values
| HEX | #40BDB6 |
| RGB | rgb(64, 189, 182) |
| HSL | hsl(177, 49%, 50%) |
| OKLCH | oklch(72.9% 0.108 189.7) |
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 #40BDB6 | 2.28:1 | Fails | Lc -49.7 | Large or bold text, headings |
| Black text on #40BDB6 | 9.17:1 | AAA | Lc 59.2 | Large or bold text, headings |
| #40BDB6 text on white | 2.28:1 | Fails | Lc 44.8 | Non-text elements, placeholder text |
| #40BDB6 text on black | 9.17:1 | AAA | Lc -57.3 | 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
#EFF7F7
oklch(97% 0.008 197)
-
Step 100
100
#DCEEED
oklch(93.6% 0.019 192.8)
-
Step 200
200
#BEE2DE
oklch(88.6% 0.038 188.3)
-
Step 300
300
#8DCFCA
oklch(80.9% 0.067 189.9)
-
Step 400
400 (this color)
#40BDB6
oklch(72.9% 0.108 189.7)
-
Step 500
500
#009E98
oklch(63.1% 0.109 190)
-
Step 600
600
#00857F
oklch(55.6% 0.096 189.2)
-
Step 700
700
#00706B
oklch(49.2% 0.085 189.4)
-
Step 800
800
#005C58
oklch(42.8% 0.074 189.6)
-
Step 900
900
#004C49
oklch(37.6% 0.065 190.2)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#40BDB6 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) | #B2B3B6 | 0.114 |
| Deuteranopia (no green cones) | #A0A5B7 | 0.109 |
| Tritanopia (no blue cones) | #00C2BB | 0.019 |
| Achromatopsia (no color) | #ABABAB | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BDB6
#40BDB6
oklch(72.9% 0.108 189.7)
- #E28A98
#E28A98
oklch(72.9% 0.108 9.8)
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 #40BDB6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.021
- Light Sea Green #20B2AA ΔE 0.038
- Greeny Blue #42B395 ΔE 0.048
- Turquoise Blue #06B1C4 ΔE 0.051
- Dark Turquoise #00CED1 ΔE 0.051
- Medium Turquoise #48D1CC ΔE 0.059
- Medium Aquamarine #66CDAA ΔE 0.062
- Green Blue #01C08D ΔE 0.068
Use #40BDB6 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.