#40BFCB
Closest named color: Dark Turquoise (#00CED1). oklch(74.1% 0.109 204.2), rgb(64, 191, 203).
Aa
Black text reads best on this color (9.53:1).
About this color
#40BFCB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.109 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.041 away. Black text reads best on it, at 9.53:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 9.53:1 |
| White text | 2.20:1 |
Values
| HEX | #40BFCB |
| RGB | rgb(64, 191, 203) |
| HSL | hsl(185, 57%, 52%) |
| OKLCH | oklch(74.1% 0.109 204.2) |
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 #40BFCB | 2.20:1 | Fails | Lc -47.8 | Large or bold text, headings |
| Black text on #40BFCB | 9.53:1 | AAA | Lc 60.9 | Content text, not long reading |
| #40BFCB text on white | 2.20:1 | Fails | Lc 43.0 | Non-text elements, placeholder text |
| #40BFCB text on black | 9.53:1 | AAA | Lc -59.2 | 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
#DBEEF0
oklch(93.6% 0.02 204.4)
-
Step 200
200
#BDE1E5
oklch(88.5% 0.038 204.7)
-
Step 300
300
#8BCED5
oklch(80.9% 0.068 204.2)
-
Step 400
400 (this color)
#40BFCB
oklch(74.1% 0.109 204.2)
-
Step 500
500
#009CA7
oklch(63.1% 0.108 203.6)
-
Step 600
600
#00838D
oklch(55.6% 0.095 204.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#004B51
oklch(37.6% 0.064 204)
-
Step 950
950
#002D31
oklch(27.1% 0.046 204.1)
#40BFCB 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) | #B0B7CC | 0.109 |
| Deuteranopia (no green cones) | #9CA8CB | 0.101 |
| Tritanopia (no blue cones) | #00C7C2 | 0.034 |
| Achromatopsia (no color) | #AFAFAF | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BFCB
#40BFCB
oklch(74.1% 0.109 204.2)
- #E88F89
#E88F89
oklch(74.1% 0.109 24.2)
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 #40BFCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.041
- Topaz #13BBAF ΔE 0.046
- Turquoise Blue #06B1C4 ΔE 0.047
- Medium Turquoise #48D1CC ΔE 0.052
- Vivid Sky Blue #4CC9F0 ΔE 0.056
- Light Sea Green #20B2AA ΔE 0.058
- Aqua Blue #02D8E9 ΔE 0.070
- Bright Sky Blue #02CCFE ΔE 0.072
Use #40BFCB 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.