#40A1BF
Closest named color: Turquoise Blue (#06B1C4). oklch(66.4% 0.099 221.9), rgb(64, 161, 191).
Aa
Black text reads best on this color (7.06:1).
About this color
#40A1BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.099 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.045 away. Black text reads best on it, at 7.06:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.06:1 |
| White text | 2.97:1 |
Values
| HEX | #40A1BF |
| RGB | rgb(64, 161, 191) |
| HSL | hsl(194, 50%, 50%) |
| OKLCH | oklch(66.4% 0.099 221.9) |
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 #40A1BF | 2.97:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #40A1BF | 7.06:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #40A1BF text on white | 2.97:1 | Fails | Lc 56.0 | Large or bold text, headings |
| #40A1BF text on black | 7.06:1 | AAA | Lc -45.8 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C7DEE6
oklch(88.6% 0.027 220.7)
-
Step 300
300
#9FC8D7
oklch(80.8% 0.048 222.2)
-
Step 400
400
#67ACC3
oklch(70.7% 0.077 221.4)
-
Step 500
500 (this color)
#40A1BF
oklch(66.4% 0.099 221.9)
-
Step 600
600
#00809E
oklch(55.6% 0.103 221.9)
-
Step 700
700
#006C85
oklch(49.2% 0.09 221.2)
-
Step 800
800
#00586E
oklch(42.7% 0.079 222.3)
-
Step 900
900
#0B495A
oklch(37.7% 0.065 221.7)
-
Step 950
950
#0B2B35
oklch(27.1% 0.041 222.2)
#40A1BF 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) | #8F9DC1 | 0.080 |
| Deuteranopia (no green cones) | #7D90BF | 0.071 |
| Tritanopia (no blue cones) | #00ABAB | 0.053 |
| Achromatopsia (no color) | #969696 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A1BF
#40A1BF
oklch(66.4% 0.099 221.9)
- #C77E62
#C77E62
oklch(66.3% 0.1 41.7)
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 #40A1BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.045
- Cadet Blue #5F9EA0 ΔE 0.048
- Greyblue #77A1B5 ΔE 0.051
- Faded Blue #658CBB ΔE 0.062
- Sea #3C9992 ΔE 0.067
- Light Sea Green #20B2AA ΔE 0.068
- Bluegrey #85A3B2 ΔE 0.069
- Silver Lake Blue #778DA9 ΔE 0.070
Use #40A1BF 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.