#40A5AB
Closest named color: Cadet Blue (#5F9EA0). oklch(66.6% 0.092 200.7), rgb(64, 165, 171).
Aa
Black text reads best on this color (7.18:1).
About this color
#40A5AB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.092 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.029 away. Black text reads best on it, at 7.18:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.18:1 |
| White text | 2.92:1 |
Values
| HEX | #40A5AB |
| RGB | rgb(64, 165, 171) |
| HSL | hsl(183, 46%, 46%) |
| OKLCH | oklch(66.6% 0.092 200.7) |
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 #40A5AB | 2.92:1 | Fails | Lc -60.7 | Content text, not long reading |
| Black text on #40A5AB | 7.18:1 | AAA | Lc 48.7 | Large or bold text, headings |
| #40A5AB text on white | 2.92:1 | Fails | Lc 55.3 | Large or bold text, headings |
| #40A5AB text on black | 7.18:1 | AAA | Lc -46.5 | 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
#E0EDED
oklch(93.6% 0.014 196.9)
-
Step 200
200
#C7DEE0
oklch(88.4% 0.025 203.1)
-
Step 300
300
#9FCACC
oklch(80.9% 0.045 199.8)
-
Step 400
400
#67AEB3
oklch(70.6% 0.072 201.5)
-
Step 500
500 (this color)
#40A5AB
oklch(66.6% 0.092 200.7)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006E74
oklch(49% 0.083 201.4)
-
Step 800
800
#005B5F
oklch(42.8% 0.073 200)
-
Step 900
900
#0A4B4F
oklch(37.7% 0.06 201.4)
-
Step 950
950
#0A2C2E
oklch(27% 0.038 200.7)
#40A5AB 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) | #999EAC | 0.094 |
| Deuteranopia (no green cones) | #8992AC | 0.087 |
| Tritanopia (no blue cones) | #00ABA7 | 0.028 |
| Achromatopsia (no color) | #979797 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A5AB
#40A5AB
oklch(66.6% 0.092 200.7)
- #C77D7C
#C77D7C
oklch(66.7% 0.093 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 #40A5AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.029
- Light Sea Green #20B2AA ΔE 0.039
- Dull Teal #5F9E8F ΔE 0.042
- Turquoise Blue #06B1C4 ΔE 0.042
- Sea #3C9992 ΔE 0.045
- Persian Green #2A9D8F ΔE 0.047
- Grey Teal #5E9B8A ΔE 0.049
- Greyblue #77A1B5 ΔE 0.055
Use #40A5AB 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.