#99EEFB
Closest named color: Robin's Egg Blue (#98EFF9). oklch(89.9% 0.084 208), rgb(153, 238, 251).
Aa
Black text reads best on this color (15.97:1).
About this color
#99EEFB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 90%, its chroma 0.084 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg Blue (#98EFF9), ΔE 0.005 away. Black text reads best on it, at 15.97:1.
| Hue family | Teals and cyans |
| Lightness | light (90%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Robin's Egg Blue (#98EFF9) |
| Black text | 15.97:1 |
| White text | 1.31:1 |
Values
| HEX | #99EEFB |
| RGB | rgb(153, 238, 251) |
| HSL | hsl(188, 92%, 79%) |
| OKLCH | oklch(89.9% 0.084 208) |
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 #99EEFB | 1.31:1 | Fails | Lc -17.7 | Dividers and decoration only |
| Black text on #99EEFB | 15.97:1 | AAA | Lc 88.2 | Fine for body text |
| #99EEFB text on white | 1.31:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #99EEFB text on black | 15.97:1 | AAA | Lc -88.3 | Fine 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
#EBF8FA
oklch(97% 0.014 207.9)
-
Step 100
100
#D3F0F5
oklch(93.6% 0.031 209.1)
-
Step 200
200 (this color)
#99EEFB
oklch(89.9% 0.084 208)
-
Step 300
300
#5ED4E5
oklch(80.9% 0.108 208.1)
-
Step 400
400
#00B5C8
oklch(70.7% 0.122 208)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#99EEFB 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) | #E1E8FC | 0.082 |
| Deuteranopia (no green cones) | #D0DBFB | 0.075 |
| Tritanopia (no blue cones) | #70F5F2 | 0.042 |
| Achromatopsia (no color) | #E0E0E0 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99EEFB
#99EEFB
oklch(89.9% 0.084 208)
- #FFD1CB
#FFD1CB
oklch(89.9% 0.053 26.8)
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 #99EEFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg Blue #98EFF9 ΔE 0.005
- Robin Egg Blue #8AF1FE ΔE 0.014
- Pale Turquoise #AFEEEE ΔE 0.027
- Robin's Egg #6DEDFD ΔE 0.037
- Diamond #B9F2FF ΔE 0.037
- Powder Blue #B0E0E6 ΔE 0.042
- Pale Sky Blue #BDF6FE ΔE 0.045
- Celeste #A8DADC ΔE 0.056
Use #99EEFB 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.