#99ECFB
Closest named color: Robin's Egg Blue (#98EFF9). oklch(89.5% 0.083 210.2), rgb(153, 236, 251).
Aa
Black text reads best on this color (15.74:1).
About this color
#99ECFB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 90%, its chroma 0.083 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg Blue (#98EFF9), ΔE 0.009 away. Black text reads best on it, at 15.74:1.
| Hue family | Teals and cyans |
| Lightness | light (90%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Robin's Egg Blue (#98EFF9) |
| Black text | 15.74:1 |
| White text | 1.33:1 |
Values
| HEX | #99ECFB |
| RGB | rgb(153, 236, 251) |
| HSL | hsl(189, 92%, 79%) |
| OKLCH | oklch(89.5% 0.083 210.2) |
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 #99ECFB | 1.33:1 | Fails | Lc -18.7 | Dividers and decoration only |
| Black text on #99ECFB | 15.74:1 | AAA | Lc 87.3 | Fine for body text |
| #99ECFB text on white | 1.33:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #99ECFB text on black | 15.74:1 | AAA | Lc -87.3 | 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
#EBF8FB
oklch(97% 0.014 213.1)
-
Step 100
100
#D3F0F5
oklch(93.6% 0.031 209.1)
-
Step 200
200 (this color)
#99ECFB
oklch(89.5% 0.083 210.2)
-
Step 300
300
#60D3E7
oklch(80.8% 0.107 210.6)
-
Step 400
400
#00B5CB
oklch(70.8% 0.123 210)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#99ECFB 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) | #DEE6FC | 0.079 |
| Deuteranopia (no green cones) | #CEDAFB | 0.072 |
| Tritanopia (no blue cones) | #70F3F0 | 0.044 |
| Achromatopsia (no color) | #DFDFDF | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99ECFB
#99ECFB
oklch(89.5% 0.083 210.2)
- #FFD0C7
#FFD0C7
oklch(89.6% 0.055 30.8)
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 #99ECFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg Blue #98EFF9 ΔE 0.009
- Robin Egg Blue #8AF1FE ΔE 0.017
- Pale Turquoise #AFEEEE ΔE 0.029
- Robin's Egg #6DEDFD ΔE 0.036
- Powder Blue #B0E0E6 ΔE 0.039
- Diamond #B9F2FF ΔE 0.039
- Pale Sky Blue #BDF6FE ΔE 0.049
- Light Blue #ADD8E6 ΔE 0.053
Use #99ECFB 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.