#40BDCC
Closest named color: Turquoise Blue (#06B1C4). oklch(73.7% 0.109 206.6), rgb(64, 189, 204).
Aa
Black text reads best on this color (9.36:1).
About this color
#40BDCC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.109 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.042 away. Black text reads best on it, at 9.36:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.36:1 |
| White text | 2.24:1 |
Values
| HEX | #40BDCC |
| RGB | rgb(64, 189, 204) |
| HSL | hsl(186, 58%, 53%) |
| OKLCH | oklch(73.7% 0.109 206.6) |
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 #40BDCC | 2.24:1 | Fails | Lc -48.6 | Large or bold text, headings |
| Black text on #40BDCC | 9.36:1 | AAA | Lc 60.1 | Content text, not long reading |
| #40BDCC text on white | 2.24:1 | Fails | Lc 43.8 | Non-text elements, placeholder text |
| #40BDCC text on black | 9.36:1 | AAA | Lc -58.3 | 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
#EFF7F8
oklch(97% 0.009 205.9)
-
Step 100
100
#DCEEF0
oklch(93.6% 0.019 204.8)
-
Step 200
200
#BDE1E6
oklch(88.5% 0.038 206.8)
-
Step 300
300
#8BCED7
oklch(81% 0.069 206.5)
-
Step 400
400 (this color)
#40BDCC
oklch(73.7% 0.109 206.6)
-
Step 500
500
#009BAA
oklch(63% 0.108 206.9)
-
Step 600
600
#00838F
oklch(55.7% 0.095 206.1)
-
Step 700
700
#006E78
oklch(49.1% 0.084 205.8)
-
Step 800
800
#005A63
oklch(42.7% 0.073 206.6)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#40BDCC 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) | #ADB6CD | 0.105 |
| Deuteranopia (no green cones) | #99A7CC | 0.097 |
| Tritanopia (no blue cones) | #00C5C1 | 0.036 |
| Achromatopsia (no color) | #ADADAD | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BDCC
#40BDCC
oklch(73.7% 0.109 206.6)
- #E68E85
#E68E85
oklch(73.6% 0.109 26.3)
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 #40BDCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.042
- Dark Turquoise #00CED1 ΔE 0.047
- Topaz #13BBAF ΔE 0.048
- Vivid Sky Blue #4CC9F0 ΔE 0.057
- Light Sea Green #20B2AA ΔE 0.057
- Medium Turquoise #48D1CC ΔE 0.059
- Bright Sky Blue #02CCFE ΔE 0.072
- Deep Sky Blue #00BFFF ΔE 0.074
Use #40BDCC 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.