#EFF4FF
Closest named color: Alice Blue (#F0F8FF). oklch(96.7% 0.016 266.3), rgb(239, 244, 255).
Aa
Black text reads best on this color (19.05:1).
About this color
#EFF4FF 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 0.011 away. Black text reads best on it, at 19.05:1.
| Hue family | Neutrals |
| Lightness | very light (97%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Alice Blue (#F0F8FF) |
| Black text | 19.05:1 |
| White text | 1.10:1 |
Values
| HEX | #EFF4FF |
| RGB | rgb(239, 244, 255) |
| HSL | hsl(221, 100%, 97%) |
| OKLCH | oklch(96.7% 0.016 266.3) |
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 #EFF4FF | 1.10:1 | Fails | Lc 0.0 | Not readable |
| Black text on #EFF4FF | 19.05:1 | AAA | Lc 99.3 | Preferred for body text |
| #EFF4FF text on white | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #EFF4FF text on black | 19.05:1 | AAA | Lc -100.5 | 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)
#EFF4FF
oklch(96.7% 0.016 266.3)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E1
oklch(88.5% 0.011 269.5)
-
Step 300
300
#BAC1CE
oklch(80.9% 0.02 263)
-
Step 400
400
#97A1B5
oklch(70.8% 0.031 264.4)
-
Step 500
500
#7E89A3
oklch(63% 0.041 267.1)
-
Step 600
600
#67738E
oklch(55.6% 0.045 266.2)
-
Step 700
700
#566079
oklch(49% 0.042 267.8)
-
Step 800
800
#464F62
oklch(42.7% 0.034 265.1)
-
Step 900
900
#3B4150
oklch(37.6% 0.027 268)
-
Step 950
950
#23262F
oklch(26.9% 0.017 270.7)
#EFF4FF 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) | #F1F5FF | 0.004 |
| Deuteranopia (no green cones) | #F0F3FF | 0.003 |
| Tritanopia (no blue cones) | #ECF6F7 | 0.014 |
| Achromatopsia (no color) | #F4F4F4 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EFF4FF
#EFF4FF
oklch(96.7% 0.016 266.3)
- #F9F3E8
#F9F3E8
oklch(96.6% 0.016 82.8)
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 #EFF4FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Alice Blue #F0F8FF ΔE 0.011
- Anti-Flash White #EDF2F4 ΔE 0.015
- White Smoke #F5F5F5 ΔE 0.016
- Ghost White #F8F8FF ΔE 0.016
- Cultured #F8F9FA ΔE 0.021
- Lavender Blush #FFF0F5 ΔE 0.023
- Very Light Pink #FFF4F2 ΔE 0.026
- Azure #F0FFFF ΔE 0.029
Use #EFF4FF 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.