#40A4AF
Closest named color: Cadet Blue (#5F9EA0). oklch(66.5% 0.093 205.3), rgb(64, 164, 175).
Aa
Black text reads best on this color (7.14:1).
About this color
#40A4AF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.093 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.030 away. Black text reads best on it, at 7.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.14:1 |
| White text | 2.93:1 |
Values
| HEX | #40A4AF |
| RGB | rgb(64, 164, 175) |
| HSL | hsl(186, 46%, 47%) |
| OKLCH | oklch(66.5% 0.093 205.3) |
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 #40A4AF | 2.93:1 | Fails | Lc -60.9 | Content text, not long reading |
| Black text on #40A4AF | 7.14:1 | AAA | Lc 48.5 | Large or bold text, headings |
| #40A4AF text on white | 2.93:1 | Fails | Lc 55.6 | Large or bold text, headings |
| #40A4AF text on black | 7.14:1 | AAA | Lc -46.2 | 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 500.
-
Step 50
50
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C7DEE1
oklch(88.4% 0.025 206.2)
-
Step 300
300
#9FCACF
oklch(81% 0.046 205.1)
-
Step 400
400
#67AEB6
oklch(70.7% 0.072 204.9)
-
Step 500
500 (this color)
#40A4AF
oklch(66.5% 0.093 205.3)
-
Step 600
600
#00838E
oklch(55.7% 0.095 205.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#0A4B51
oklch(37.8% 0.061 204.7)
-
Step 950
950
#0A2C2F
oklch(27% 0.039 203.4)
#40A4AF 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) | #979EB0 | 0.091 |
| Deuteranopia (no green cones) | #8791AF | 0.085 |
| Tritanopia (no blue cones) | #00ABA7 | 0.033 |
| Achromatopsia (no color) | #979797 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A4AF
#40A4AF
oklch(66.5% 0.093 205.3)
- #C67D77
#C67D77
oklch(66.5% 0.092 24.9)
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 #40A4AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.030
- Turquoise Blue #06B1C4 ΔE 0.041
- Light Sea Green #20B2AA ΔE 0.045
- Dull Teal #5F9E8F ΔE 0.047
- Sea #3C9992 ΔE 0.048
- Persian Green #2A9D8F ΔE 0.052
- Greyblue #77A1B5 ΔE 0.052
- Grey Teal #5E9B8A ΔE 0.054
Use #40A4AF 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.