#40ABC5
Closest named color: Turquoise Blue (#06B1C4). oklch(69.1% 0.103 217), rgb(64, 171, 197).
Aa
Black text reads best on this color (7.84:1).
About this color
#40ABC5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.103 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.024 away. Black text reads best on it, at 7.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.84:1 |
| White text | 2.67:1 |
Values
| HEX | #40ABC5 |
| RGB | rgb(64, 171, 197) |
| HSL | hsl(192, 53%, 51%) |
| OKLCH | oklch(69.1% 0.103 217) |
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 #40ABC5 | 2.67:1 | Fails | Lc -56.9 | Large or bold text, headings |
| Black text on #40ABC5 | 7.84:1 | AAA | Lc 52.3 | Large or bold text, headings |
| #40ABC5 text on white | 2.67:1 | Fails | Lc 51.7 | Large or bold text, headings |
| #40ABC5 text on black | 7.84:1 | AAA | Lc -50.2 | 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 400.
-
Step 50
50
#EFF7F9
oklch(97.1% 0.009 214.3)
-
Step 100
100
#DDEDF2
oklch(93.6% 0.018 218.4)
-
Step 200
200
#C0DFE9
oklch(88.4% 0.036 219.2)
-
Step 300
300
#91CBDC
oklch(80.8% 0.064 217.9)
-
Step 400
400 (this color)
#40ABC5
oklch(69.1% 0.103 217)
-
Step 500
500
#0099B6
oklch(63% 0.113 217.6)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#40ABC5 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) | #9AA6C6 | 0.090 |
| Deuteranopia (no green cones) | #8798C5 | 0.081 |
| Tritanopia (no blue cones) | #00B4B3 | 0.047 |
| Achromatopsia (no color) | #9E9E9E | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40ABC5
#40ABC5
oklch(69.1% 0.103 217)
- #D3846D
#D3846D
oklch(69.1% 0.104 37)
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 #40ABC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.024
- Greyblue #77A1B5 ΔE 0.051
- Light Sea Green #20B2AA ΔE 0.054
- Cadet Blue #5F9EA0 ΔE 0.057
- Bluegrey #85A3B2 ΔE 0.065
- Topaz #13BBAF ΔE 0.066
- Bluey Grey #89A0B0 ΔE 0.071
- Dull Teal #5F9E8F ΔE 0.077
Use #40ABC5 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.