#ECF3FD
Closest named color: Anti-Flash White (#EDF2F4). oklch(96.2% 0.015 257.2), rgb(236, 243, 253).
Aa
Black text reads best on this color (18.80:1).
About this color
#ECF3FD is a very light close to neutral grey. In OKLCH its lightness is 96%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Anti-Flash White (#EDF2F4), ΔE 0.012 away. Black text reads best on it, at 18.80:1.
| Hue family | Neutrals |
| Lightness | very light (96%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Anti-Flash White (#EDF2F4) |
| Black text | 18.80:1 |
| White text | 1.11:1 |
Values
| HEX | #ECF3FD |
| RGB | rgb(236, 243, 253) |
| HSL | hsl(215, 81%, 96%) |
| OKLCH | oklch(96.2% 0.015 257.2) |
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 #ECF3FD | 1.11:1 | Fails | Lc 0.0 | Not readable |
| Black text on #ECF3FD | 18.80:1 | AAA | Lc 98.5 | Preferred for body text |
| #ECF3FD text on white | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #ECF3FD text on black | 18.80:1 | AAA | Lc -99.5 | 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)
#ECF3FD
oklch(96.2% 0.015 257.2)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#B9C1CE
oklch(80.9% 0.02 260.2)
-
Step 400
400
#94A2B5
oklch(70.7% 0.032 256)
-
Step 500
500
#7A8BA2
oklch(63.1% 0.04 256)
-
Step 600
600
#63758D
oklch(55.7% 0.043 255.7)
-
Step 700
700
#526278
oklch(49.1% 0.041 256.4)
-
Step 800
800
#435062
oklch(42.7% 0.034 256.6)
-
Step 900
900
#394250
oklch(37.7% 0.027 259.2)
-
Step 950
950
#21272F
oklch(27% 0.017 255.7)
#ECF3FD 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) | #F0F3FE | 0.006 |
| Deuteranopia (no green cones) | #EEF2FD | 0.003 |
| Tritanopia (no blue cones) | #E8F5F6 | 0.014 |
| Achromatopsia (no color) | #F2F2F2 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #ECF3FD
#ECF3FD
oklch(96.2% 0.015 257.2)
- #F8F1E7
#F8F1E7
oklch(96.1% 0.015 77.1)
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 #ECF3FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Anti-Flash White #EDF2F4 ΔE 0.012
- Alice Blue #F0F8FF ΔE 0.014
- White Smoke #F5F5F5 ΔE 0.018
- Ghost White #F8F8FF ΔE 0.021
- Cultured #F8F9FA ΔE 0.024
- Lavender Blush #FFF0F5 ΔE 0.026
- Very Light Pink #FFF4F2 ΔE 0.029
- Azure #F0FFFF ΔE 0.031
Use #ECF3FD 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.