#40D7E2
Closest named color: Aqua Blue (#02D8E9). oklch(80.7% 0.123 202.3), rgb(64, 215, 226).
Aa
Black text reads best on this color (12.03:1).
About this color
#40D7E2 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.123 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.016 away. Black text reads best on it, at 12.03:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.03:1 |
| White text | 1.74:1 |
Values
| HEX | #40D7E2 |
| RGB | rgb(64, 215, 226) |
| HSL | hsl(184, 74%, 57%) |
| OKLCH | oklch(80.7% 0.123 202.3) |
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 #40D7E2 | 1.74:1 | Fails | Lc -35.2 | Non-text elements, placeholder text |
| Black text on #40D7E2 | 12.03:1 | AAA | Lc 72.5 | Content text, not long reading |
| #40D7E2 text on white | 1.74:1 | Fails | Lc 31.4 | Non-text elements, placeholder text |
| #40D7E2 text on black | 12.03:1 | AAA | Lc -71.4 | Content text, not long reading |
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 300.
-
Step 50
50
#E9F9FA
oklch(97.1% 0.017 201.4)
-
Step 100
100
#CFF1F4
oklch(93.5% 0.036 203.1)
-
Step 200
200
#A3E7ED
oklch(88.5% 0.068 202.9)
-
Step 300
300 (this color)
#40D7E2
oklch(80.7% 0.123 202.3)
-
Step 400
400
#00B6C1
oklch(70.7% 0.12 202.5)
-
Step 500
500
#009CA5
oklch(63.1% 0.107 202)
-
Step 600
600
#00838B
oklch(55.5% 0.095 202.3)
-
Step 700
700
#006E75
oklch(49% 0.083 202.5)
-
Step 800
800
#005A60
oklch(42.6% 0.073 202.7)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#40D7E2 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) | #C6CEE3 | 0.123 |
| Deuteranopia (no green cones) | #AFBDE3 | 0.114 |
| Tritanopia (no blue cones) | #00DFDA | 0.031 |
| Achromatopsia (no color) | #C4C4C4 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D7E2
#40D7E2
oklch(80.7% 0.123 202.3)
- #FFA3A0
#FFA3A0
oklch(80.7% 0.11 21.8)
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 #40D7E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.016
- Medium Turquoise #48D1CC ΔE 0.031
- Dark Turquoise #00CED1 ΔE 0.038
- Turquoise #40E0D0 ΔE 0.042
- Vivid Sky Blue #4CC9F0 ΔE 0.049
- Sky Blue #87CEEB ΔE 0.058
- Bright Sky Blue #02CCFE ΔE 0.060
- Seafoam Blue #78D1B6 ΔE 0.063
Use #40D7E2 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.