#40BCC3
Closest named color: Topaz (#13BBAF). oklch(73.1% 0.107 200.5), rgb(64, 188, 195).
Aa
Black text reads best on this color (9.19:1).
About this color
#40BCC3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.107 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.036 away. Black text reads best on it, at 9.19:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.19:1 |
| White text | 2.28:1 |
Values
| HEX | #40BCC3 |
| RGB | rgb(64, 188, 195) |
| HSL | hsl(183, 52%, 51%) |
| OKLCH | oklch(73.1% 0.107 200.5) |
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 #40BCC3 | 2.28:1 | Fails | Lc -49.5 | Large or bold text, headings |
| Black text on #40BCC3 | 9.19:1 | AAA | Lc 59.3 | Large or bold text, headings |
| #40BCC3 text on white | 2.28:1 | Fails | Lc 44.7 | Non-text elements, placeholder text |
| #40BCC3 text on black | 9.19:1 | AAA | Lc -57.4 | 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
#BEE1E3
oklch(88.5% 0.037 200.8)
-
Step 300
300
#8CCED2
oklch(80.9% 0.067 200.7)
-
Step 400
400 (this color)
#40BCC3
oklch(73.1% 0.107 200.5)
-
Step 500
500
#009CA3
oklch(63% 0.107 200.4)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006F74
oklch(49.2% 0.084 200.3)
-
Step 800
800
#005B5F
oklch(42.8% 0.073 200)
-
Step 900
900
#004B4F
oklch(37.5% 0.064 200.9)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#40BCC3 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) | #AEB4C4 | 0.108 |
| Deuteranopia (no green cones) | #9BA5C4 | 0.102 |
| Tritanopia (no blue cones) | #00C3BE | 0.028 |
| Achromatopsia (no color) | #ACACAC | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BCC3
#40BCC3
oklch(73.1% 0.107 200.5)
- #E38C8B
#E38C8B
oklch(73% 0.107 20.7)
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 #40BCC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.036
- Turquoise Blue #06B1C4 ΔE 0.040
- Light Sea Green #20B2AA ΔE 0.046
- Dark Turquoise #00CED1 ΔE 0.048
- Medium Turquoise #48D1CC ΔE 0.059
- Greeny Blue #42B395 ΔE 0.065
- Vivid Sky Blue #4CC9F0 ΔE 0.069
- Medium Aquamarine #66CDAA ΔE 0.075
Use #40BCC3 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.