#40A0AA
Closest named color: Cadet Blue (#5F9EA0). oklch(65.3% 0.09 204.8), rgb(64, 160, 170).
Aa
Black text reads best on this color (6.82:1).
About this color
#40A0AA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.090 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.027 away. Black text reads best on it, at 6.82:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.82:1 |
| White text | 3.07:1 |
Values
| HEX | #40A0AA |
| RGB | rgb(64, 160, 170) |
| HSL | hsl(186, 45%, 46%) |
| OKLCH | oklch(65.3% 0.09 204.8) |
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 #40A0AA | 3.07:1 | AA large text | Lc -62.8 | Content text, not long reading |
| Black text on #40A0AA | 6.82:1 | AA | Lc 46.6 | Large or bold text, headings |
| #40A0AA text on white | 3.07:1 | AA large text | Lc 57.4 | Large or bold text, headings |
| #40A0AA text on black | 6.82:1 | AA | Lc -44.4 | Non-text elements, placeholder text |
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
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C7DEE1
oklch(88.4% 0.025 206.2)
-
Step 300
300
#A0C9CE
oklch(80.8% 0.044 205.5)
-
Step 400
400
#69AEB5
oklch(70.8% 0.07 204)
-
Step 500
500 (this color)
#40A0AA
oklch(65.3% 0.09 204.8)
-
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
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#0E4A50
oklch(37.6% 0.058 205.1)
-
Step 950
950
#0C2C2F
oklch(27.1% 0.037 203.8)
#40A0AA 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) | #949AAB | 0.089 |
| Deuteranopia (no green cones) | #848EAA | 0.082 |
| Tritanopia (no blue cones) | #00A6A3 | 0.031 |
| Achromatopsia (no color) | #939393 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A0AA
#40A0AA
oklch(65.3% 0.09 204.8)
- #C17A75
#C17A75
oklch(65.3% 0.09 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 #40A0AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.027
- Sea #3C9992 ΔE 0.037
- Dull Teal #5F9E8F ΔE 0.043
- Persian Green #2A9D8F ΔE 0.044
- Grey Teal #5E9B8A ΔE 0.047
- Blue Green #0F9B8E ΔE 0.051
- Turquoise Blue #06B1C4 ΔE 0.052
- Light Sea Green #20B2AA ΔE 0.053
Use #40A0AA 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.