#99ECF0
Closest named color: Robin's Egg Blue (#98EFF9). oklch(89.1% 0.081 199.7), rgb(153, 236, 240).
Aa
Black text reads best on this color (15.61:1).
About this color
#99ECF0 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 89%, its chroma 0.081 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg Blue (#98EFF9), ΔE 0.013 away. Black text reads best on it, at 15.61:1.
| Hue family | Teals and cyans |
| Lightness | light (89%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Robin's Egg Blue (#98EFF9) |
| Black text | 15.61:1 |
| White text | 1.34:1 |
Values
| HEX | #99ECF0 |
| RGB | rgb(153, 236, 240) |
| HSL | hsl(183, 74%, 77%) |
| OKLCH | oklch(89.1% 0.081 199.7) |
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 #99ECF0 | 1.34:1 | Fails | Lc -19.3 | Dividers and decoration only |
| Black text on #99ECF0 | 15.61:1 | AAA | Lc 86.8 | Fine for body text |
| #99ECF0 text on white | 1.34:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #99ECF0 text on black | 15.61:1 | AAA | Lc -86.8 | 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
#EBF8F9
oklch(97% 0.014 202.5)
-
Step 100
100
#D4F0F2
oklch(93.5% 0.029 201.9)
-
Step 200
200 (this color)
#99ECF0
oklch(89.1% 0.081 199.7)
-
Step 300
300
#62D5DB
oklch(80.9% 0.104 200)
-
Step 400
400
#00B7BE
oklch(70.8% 0.12 199.7)
-
Step 500
500
#009DA3
oklch(63.2% 0.108 199.6)
-
Step 600
600
#008489
oklch(55.7% 0.095 199.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4F
oklch(37.8% 0.064 199.4)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#99ECF0 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) | #E1E5F0 | 0.083 |
| Deuteranopia (no green cones) | #D1D9F1 | 0.077 |
| Tritanopia (no blue cones) | #76F2ED | 0.033 |
| Achromatopsia (no color) | #DEDEDE | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99ECF0
#99ECF0
oklch(89.1% 0.081 199.7)
- #FFCDCC
#FFCDCC
oklch(89.2% 0.057 19.6)
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 #99ECF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg Blue #98EFF9 ΔE 0.013
- Robin Egg Blue #8AF1FE ΔE 0.021
- Pale Turquoise #AFEEEE ΔE 0.024
- Powder Blue #B0E0E6 ΔE 0.035
- Robin's Egg #6DEDFD ΔE 0.038
- Diamond #B9F2FF ΔE 0.044
- Celeste #A8DADC ΔE 0.047
- Pale Sky Blue #BDF6FE ΔE 0.051
Use #99ECF0 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.