#99ECEE
Closest named color: Robin's Egg Blue (#98EFF9). oklch(89.1% 0.081 197.7), rgb(153, 236, 238).
Aa
Black text reads best on this color (15.58:1).
About this color
#99ECEE is a light, moderately saturated teal or cyan. In OKLCH its lightness is 89%, its chroma 0.081 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg Blue (#98EFF9), ΔE 0.015 away. Black text reads best on it, at 15.58:1.
| Hue family | Teals and cyans |
| Lightness | light (89%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Robin's Egg Blue (#98EFF9) |
| Black text | 15.58:1 |
| White text | 1.34:1 |
Values
| HEX | #99ECEE |
| RGB | rgb(153, 236, 238) |
| HSL | hsl(181, 71%, 77%) |
| OKLCH | oklch(89.1% 0.081 197.7) |
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 #99ECEE | 1.34:1 | Fails | Lc -19.4 | Dividers and decoration only |
| Black text on #99ECEE | 15.58:1 | AAA | Lc 86.7 | Fine for body text |
| #99ECEE text on white | 1.34:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #99ECEE text on black | 15.58:1 | AAA | Lc -86.7 | 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
#EBF9F9
oklch(97.2% 0.015 196.9)
-
Step 100
100
#D4F0F1
oklch(93.5% 0.029 199.3)
-
Step 200
200 (this color)
#99ECEE
oklch(89.1% 0.081 197.7)
-
Step 300
300
#63D5D8
oklch(80.8% 0.103 197.6)
-
Step 400
400
#00B7BB
oklch(70.7% 0.12 197.6)
-
Step 500
500
#009DA1
oklch(63.2% 0.107 198)
-
Step 600
600
#008487
oklch(55.6% 0.095 197.6)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800
#005B5D
oklch(42.7% 0.073 197.4)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#99ECEE 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) | #E1E5EE | 0.083 |
| Deuteranopia (no green cones) | #D2D9EF | 0.078 |
| Tritanopia (no blue cones) | #76F1EC | 0.032 |
| Achromatopsia (no color) | #DEDEDE | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99ECEE
#99ECEE
oklch(89.1% 0.081 197.7)
- #FFCDCD
#FFCDCD
oklch(89.2% 0.057 18.3)
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 #99ECEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg Blue #98EFF9 ΔE 0.015
- Robin Egg Blue #8AF1FE ΔE 0.023
- Pale Turquoise #AFEEEE ΔE 0.024
- Powder Blue #B0E0E6 ΔE 0.035
- Robin's Egg #6DEDFD ΔE 0.039
- Diamond #B9F2FF ΔE 0.045
- Celeste #A8DADC ΔE 0.047
- Pale Sky Blue #BDF6FE ΔE 0.052
Use #99ECEE 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.