#4FFDE9
Closest named color: Bright Aqua (#0BF9EA). oklch(90.2% 0.142 183.9), rgb(79, 253, 233).
Aa
Black text reads best on this color (16.55:1).
About this color
#4FFDE9 is a very light, vivid teal or cyan. In OKLCH its lightness is 90%, its chroma 0.142 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.022 away. Black text reads best on it, at 16.55:1.
| Hue family | Teals and cyans |
| Lightness | very light (90%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 16.55:1 |
| White text | 1.26:1 |
Values
| HEX | #4FFDE9 |
| RGB | rgb(79, 253, 233) |
| HSL | hsl(173, 98%, 65%) |
| OKLCH | oklch(90.2% 0.142 183.9) |
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 #4FFDE9 | 1.26:1 | Fails | Lc -14.9 | Not readable |
| Black text on #4FFDE9 | 16.55:1 | AAA | Lc 90.7 | Preferred for body text |
| #4FFDE9 text on white | 1.26:1 | Fails | Lc 12.9 | Not readable |
| #4FFDE9 text on black | 16.55:1 | AAA | Lc -91.0 | 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
#E4FBF7
oklch(97% 0.025 184.3)
-
Step 100
100
#C4F6EE
oklch(93.6% 0.052 184.4)
-
Step 200
200 (this color)
#4FFDE9
oklch(90.2% 0.142 183.9)
-
Step 300
300
#00DECB
oklch(80.9% 0.143 184)
-
Step 400
400
#00B9A9
oklch(70.6% 0.125 184)
-
Step 500
500
#009F91
oklch(63.1% 0.112 184)
-
Step 600
600
#00867A
oklch(55.7% 0.099 183.9)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#004D45
oklch(37.7% 0.067 183.1)
-
Step 950
950
#002E29
oklch(27.1% 0.048 183.6)
#4FFDE9 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) | #F1EFE8 | 0.151 |
| Deuteranopia (no green cones) | #D8DDEB | 0.142 |
| Tritanopia (no blue cones) | #00FFF7 | 0.022 |
| Achromatopsia (no color) | #E4E4E4 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4FFDE9
#4FFDE9
oklch(90.2% 0.142 183.9)
- #FFD1DB
#FFD1DB
oklch(90.3% 0.053 3.6)
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 #4FFDE9, closest first.
No curated palette has a color within ΔE 0.04 of #4FFDE9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.022
- Bright Turquoise #0FFEF9 ΔE 0.024
- Bright Cyan #41FDFE ΔE 0.029
- Cyan #00FFFF ΔE 0.031
- Bright Light Blue #26F7FD ΔE 0.039
- Aquamarine #7FFFD4 ΔE 0.039
- Light Turquoise #7EF4CC ΔE 0.042
- Light Aqua #8CFFDB ΔE 0.042
Use #4FFDE9 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.