#ECF9FF
Closest named color: Alice Blue (#F0F8FF). oklch(97.4% 0.016 227), rgb(236, 249, 255).
Aa
Black text reads best on this color (19.56:1).
About this color
#ECF9FF is a very light close to neutral grey. In OKLCH its lightness is 97%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Alice Blue (#F0F8FF), ΔE 0.005 away. Black text reads best on it, at 19.56:1.
| Hue family | Neutrals |
| Lightness | very light (97%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Alice Blue (#F0F8FF) |
| Black text | 19.56:1 |
| White text | 1.07:1 |
Values
| HEX | #ECF9FF |
| RGB | rgb(236, 249, 255) |
| HSL | hsl(199, 100%, 96%) |
| OKLCH | oklch(97.4% 0.016 227) |
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 #ECF9FF | 1.07:1 | Fails | Lc 0.0 | Not readable |
| Black text on #ECF9FF | 19.56:1 | AAA | Lc 101.1 | Preferred for body text |
| #ECF9FF text on white | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #ECF9FF text on black | 19.56:1 | AAA | Lc -102.4 | 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 50.
-
Step 50
50 (this color)
#ECF9FF
oklch(97.4% 0.016 227)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DBDF
oklch(88.6% 0.011 226)
-
Step 300
300
#B4C4CB
oklch(81% 0.02 225.8)
-
Step 400
400
#8CA5B1
oklch(70.7% 0.033 228.4)
-
Step 500
500
#6F8F9D
oklch(63.1% 0.042 226.5)
-
Step 600
600
#577988
oklch(55.6% 0.045 227.1)
-
Step 700
700
#476674
oklch(49.2% 0.042 227.8)
-
Step 800
800
#3A535E
oklch(42.6% 0.035 227)
-
Step 900
900
#32454D
oklch(37.8% 0.028 225.7)
-
Step 950
950
#1E282D
oklch(27% 0.017 229.8)
#ECF9FF 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) | #F6F8FF | 0.013 |
| Deuteranopia (no green cones) | #F3F6FF | 0.011 |
| Tritanopia (no blue cones) | #E7FBFB | 0.011 |
| Achromatopsia (no color) | #F7F7F7 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #ECF9FF
#ECF9FF
oklch(97.4% 0.016 227)
- #FFF4EF
#FFF4EF
oklch(97.4% 0.014 46.2)
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 #ECF9FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Alice Blue #F0F8FF ΔE 0.005
- Ghost White #F8F8FF ΔE 0.015
- Cultured #F8F9FA ΔE 0.016
- White Smoke #F5F5F5 ΔE 0.016
- Azure #F0FFFF ΔE 0.017
- Anti-Flash White #EDF2F4 ΔE 0.019
- Light Cyan #E0FFFF ΔE 0.020
- Mint Cream #F5FFFA ΔE 0.023
Use #ECF9FF 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.