#40FFF3
Closest named color: Bright Turquoise (#0FFEF9). oklch(90.7% 0.146 188.4), rgb(64, 255, 243).
Aa
Black text reads best on this color (16.81:1).
About this color
#40FFF3 is a very light, vivid teal or cyan. In OKLCH its lightness is 91%, its chroma 0.146 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Turquoise (#0FFEF9), ΔE 0.014 away. Black text reads best on it, at 16.81:1.
| Hue family | Teals and cyans |
| Lightness | very light (91%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Bright Turquoise (#0FFEF9) |
| Black text | 16.81:1 |
| White text | 1.24:1 |
Values
| HEX | #40FFF3 |
| RGB | rgb(64, 255, 243) |
| HSL | hsl(176, 100%, 63%) |
| OKLCH | oklch(90.7% 0.146 188.4) |
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 #40FFF3 | 1.24:1 | Fails | Lc -13.7 | Not readable |
| Black text on #40FFF3 | 16.81:1 | AAA | Lc 91.7 | Preferred for body text |
| #40FFF3 text on white | 1.24:1 | Fails | Lc 11.8 | Not readable |
| #40FFF3 text on black | 16.81:1 | AAA | Lc -92.2 | Preferred for body text |
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 200.
-
Step 50
50
#E4FBF9
oklch(97.1% 0.024 190.4)
-
Step 100
100
#C1F6F1
oklch(93.5% 0.054 189.1)
-
Step 200
200 (this color)
#40FFF3
oklch(90.7% 0.146 188.4)
-
Step 300
300
#00DDD2
oklch(80.9% 0.14 188.4)
-
Step 400
400
#00B9AF
oklch(70.8% 0.123 188)
-
Step 500
500
#009E96
oklch(63% 0.109 188.5)
-
Step 600
600
#00857E
oklch(55.6% 0.097 188.3)
-
Step 700
700
#00706A
oklch(49.1% 0.085 188.3)
-
Step 800
800
#005C57
oklch(42.8% 0.074 188.4)
-
Step 900
900
#004C48
oklch(37.6% 0.065 188.7)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#40FFF3 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) | #F1F1F3 | 0.155 |
| Deuteranopia (no green cones) | #D6DEF5 | 0.145 |
| Tritanopia (no blue cones) | #00FFFB | 0.015 |
| Achromatopsia (no color) | #E6E6E6 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40FFF3
#40FFF3
oklch(90.7% 0.146 188.4)
- #FFD3DA
#FFD3DA
oklch(90.6% 0.05 7.4)
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 #40FFF3, closest first.
No curated palette has a color within ΔE 0.04 of #40FFF3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Turquoise #0FFEF9 ΔE 0.014
- Bright Cyan #41FDFE ΔE 0.018
- Cyan #00FFFF ΔE 0.019
- Bright Aqua #0BF9EA ΔE 0.024
- Bright Light Blue #26F7FD ΔE 0.031
- Aquamarine #7FFFD4 ΔE 0.050
- Light Aqua #8CFFDB ΔE 0.051
- Light Turquoise #7EF4CC ΔE 0.055
Use #40FFF3 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.