#99FFEF
Closest named color: Pale Aqua (#B8FFEB). oklch(93.3% 0.099 183), rgb(153, 255, 239).
Aa
Black text reads best on this color (17.90:1).
About this color
#99FFEF is a very light, moderately saturated teal or cyan. In OKLCH its lightness is 93%, its chroma 0.099 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Pale Aqua (#B8FFEB), ΔE 0.030 away. Black text reads best on it, at 17.90:1.
| Hue family | Teals and cyans |
| Lightness | very light (93%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Pale Aqua (#B8FFEB) |
| Black text | 17.90:1 |
| White text | 1.17:1 |
Values
| HEX | #99FFEF |
| RGB | rgb(153, 255, 239) |
| HSL | hsl(171, 100%, 80%) |
| OKLCH | oklch(93.3% 0.099 183) |
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 #99FFEF | 1.17:1 | Fails | Lc -9.6 | Not readable |
| Black text on #99FFEF | 17.90:1 | AAA | Lc 95.4 | Preferred for body text |
| #99FFEF text on white | 1.17:1 | Fails | Lc 8.1 | Not readable |
| #99FFEF text on black | 17.90:1 | AAA | Lc -96.2 | 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 100.
-
Step 50
50
#EAF9F6
oklch(97% 0.016 182.7)
-
Step 100
100 (this color)
#99FFEF
oklch(93.3% 0.099 183)
-
Step 200
200
#A4E9DD
oklch(88.5% 0.071 182.6)
-
Step 300
300
#45DBC8
oklch(80.9% 0.127 182.9)
-
Step 400
400
#00BAA8
oklch(70.8% 0.126 182.8)
-
Step 500
500
#009F90
oklch(63.1% 0.112 183.2)
-
Step 600
600
#008679
oklch(55.7% 0.099 183.1)
-
Step 700
700
#007065
oklch(49% 0.087 183.1)
-
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)
#99FFEF 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) | #F6F4EE | 0.105 |
| Deuteranopia (no green cones) | #E5E7F0 | 0.100 |
| Tritanopia (no blue cones) | #72FFFA | 0.032 |
| Achromatopsia (no color) | #EDEDED | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99FFEF
#99FFEF
oklch(93.3% 0.099 183)
- #FFE0E6
#FFE0E6
oklch(93.4% 0.035 4.6)
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 #99FFEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pale Aqua #B8FFEB ΔE 0.030
- Light Aqua #8CFFDB ΔE 0.031
- Pale Cyan #B7FFFA ΔE 0.035
- Duck Egg Blue #C3FBF4 ΔE 0.044
- Aquamarine #7FFFD4 ΔE 0.046
- Eggshell Blue #C4FFF7 ΔE 0.046
- Pale Turquoise #AFEEEE ΔE 0.048
- Robin's Egg Blue #98EFF9 ΔE 0.050
Use #99FFEF 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.