#40AAB4
Closest named color: Turquoise Blue (#06B1C4). oklch(68.2% 0.096 204), rgb(64, 170, 180).
Aa
Black text reads best on this color (7.62:1).
About this color
#40AAB4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.096 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.028 away. Black text reads best on it, at 7.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.62:1 |
| White text | 2.75:1 |
Values
| HEX | #40AAB4 |
| RGB | rgb(64, 170, 180) |
| HSL | hsl(185, 48%, 48%) |
| OKLCH | oklch(68.2% 0.096 204) |
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 #40AAB4 | 2.75:1 | Fails | Lc -58.1 | Large or bold text, headings |
| Black text on #40AAB4 | 7.62:1 | AAA | Lc 51.1 | Large or bold text, headings |
| #40AAB4 text on white | 2.75:1 | Fails | Lc 52.9 | Large or bold text, headings |
| #40AAB4 text on black | 7.62:1 | AAA | Lc -49.0 | 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
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DDEDEF
oklch(93.5% 0.017 205.8)
-
Step 200
200
#C1E0E3
oklch(88.5% 0.033 203.7)
-
Step 300
300
#92CCD2
oklch(80.8% 0.06 204.1)
-
Step 400
400 (this color)
#40AAB4
oklch(68.2% 0.096 204)
-
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
#006E76
oklch(49.1% 0.084 203.6)
-
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)
#40AAB4 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) | #9DA3B5 | 0.096 |
| Deuteranopia (no green cones) | #8C96B4 | 0.089 |
| Tritanopia (no blue cones) | #00B1AD | 0.032 |
| Achromatopsia (no color) | #9C9C9C | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40AAB4
#40AAB4
oklch(68.2% 0.096 204)
- #CE817C
#CE817C
oklch(68.3% 0.096 23.9)
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 #40AAB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.028
- Light Sea Green #20B2AA ΔE 0.034
- Cadet Blue #5F9EA0 ΔE 0.040
- Greyblue #77A1B5 ΔE 0.052
- Topaz #13BBAF ΔE 0.053
- Dull Teal #5F9E8F ΔE 0.055
- Greeny Blue #42B395 ΔE 0.060
- Sea #3C9992 ΔE 0.062
Use #40AAB4 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.