#40A1BC
Closest named color: Cadet Blue (#5F9EA0). oklch(66.3% 0.097 219.5), rgb(64, 161, 188).
Aa
Black text reads best on this color (7.04:1).
About this color
#40A1BC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.097 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.044 away. Black text reads best on it, at 7.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.04:1 |
| White text | 2.98:1 |
Values
| HEX | #40A1BC |
| RGB | rgb(64, 161, 188) |
| HSL | hsl(193, 49%, 49%) |
| OKLCH | oklch(66.3% 0.097 219.5) |
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 #40A1BC | 2.98:1 | Fails | Lc -61.5 | Content text, not long reading |
| Black text on #40A1BC | 7.04:1 | AAA | Lc 47.9 | Large or bold text, headings |
| #40A1BC text on white | 2.98:1 | Fails | Lc 56.2 | Large or bold text, headings |
| #40A1BC text on black | 7.04:1 | AAA | Lc -45.6 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C7DEE5
oklch(88.6% 0.026 218)
-
Step 300
300
#9FC8D6
oklch(80.8% 0.048 220.7)
-
Step 400
400
#67ACC1
oklch(70.7% 0.076 219.5)
-
Step 500
500 (this color)
#40A1BC
oklch(66.3% 0.097 219.5)
-
Step 600
600
#00809C
oklch(55.5% 0.101 220.3)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#0B4959
oklch(37.7% 0.064 220.3)
-
Step 950
950
#0B2B34
oklch(27% 0.04 219.8)
#40A1BC 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) | #909DBD | 0.082 |
| Deuteranopia (no green cones) | #7F90BC | 0.074 |
| Tritanopia (no blue cones) | #00AAAA | 0.048 |
| Achromatopsia (no color) | #959595 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A1BC
#40A1BC
oklch(66.3% 0.097 219.5)
- #C67E65
#C67E65
oklch(66.3% 0.097 39.9)
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 #40A1BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.044
- Turquoise Blue #06B1C4 ΔE 0.045
- Greyblue #77A1B5 ΔE 0.050
- Sea #3C9992 ΔE 0.063
- Faded Blue #658CBB ΔE 0.064
- Light Sea Green #20B2AA ΔE 0.065
- Dull Teal #5F9E8F ΔE 0.067
- Bluegrey #85A3B2 ΔE 0.068
Use #40A1BC 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.