#40BFB2
Closest named color: Topaz (#13BBAF). oklch(73.3% 0.111 185.3), rgb(64, 191, 178).
Aa
Black text reads best on this color (9.31:1).
About this color
#40BFB2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.111 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.022 away. Black text reads best on it, at 9.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.31:1 |
| White text | 2.25:1 |
Values
| HEX | #40BFB2 |
| RGB | rgb(64, 191, 178) |
| HSL | hsl(174, 50%, 50%) |
| OKLCH | oklch(73.3% 0.111 185.3) |
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 #40BFB2 | 2.25:1 | Fails | Lc -48.9 | Large or bold text, headings |
| Black text on #40BFB2 | 9.31:1 | AAA | Lc 59.9 | Large or bold text, headings |
| #40BFB2 text on white | 2.25:1 | Fails | Lc 44.1 | Non-text elements, placeholder text |
| #40BFB2 text on black | 9.31:1 | AAA | Lc -58.0 | 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
#EFF8F6
oklch(97.2% 0.01 181.4)
-
Step 100
100
#DCEEEC
oklch(93.5% 0.019 188.8)
-
Step 200
200
#BEE2DC
oklch(88.5% 0.039 184.3)
-
Step 300
300
#8CD0C7
oklch(81% 0.07 185.5)
-
Step 400
400 (this color)
#40BFB2
oklch(73.3% 0.111 185.3)
-
Step 500
500
#009F93
oklch(63.2% 0.111 185.4)
-
Step 600
600
#00857B
oklch(55.5% 0.097 185.6)
-
Step 700
700
#007067
oklch(49% 0.086 185.2)
-
Step 800
800
#005C55
oklch(42.7% 0.075 185.9)
-
Step 900
900
#004D46
oklch(37.8% 0.067 184.5)
-
Step 950
950
#002E2A
oklch(27.1% 0.048 185.8)
#40BFB2 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) | #B6B5B2 | 0.119 |
| Deuteranopia (no green cones) | #A3A7B3 | 0.111 |
| Tritanopia (no blue cones) | #00C3BB | 0.019 |
| Achromatopsia (no color) | #ADADAD | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BFB2
#40BFB2
oklch(73.3% 0.111 185.3)
- #E38A9F
#E38A9F
oklch(73.2% 0.111 4.9)
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 #40BFB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.022
- Light Sea Green #20B2AA ΔE 0.042
- Greeny Blue #42B395 ΔE 0.046
- Dark Turquoise #00CED1 ΔE 0.050
- Medium Aquamarine #66CDAA ΔE 0.054
- Medium Turquoise #48D1CC ΔE 0.056
- Turquoise Blue #06B1C4 ΔE 0.059
- Green Blue #01C08D ΔE 0.060
Use #40BFB2 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.