#EFF3FF
Closest named color: Alice Blue (#F0F8FF). oklch(96.5% 0.017 271.2), rgb(239, 243, 255).
Aa
Black text reads best on this color (18.93:1).
About this color
#EFF3FF is a very light close to neutral grey. In OKLCH its lightness is 96%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Alice Blue (#F0F8FF), ΔE 0.013 away. Black text reads best on it, at 18.93:1.
| Hue family | Neutrals |
| Lightness | very light (96%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Alice Blue (#F0F8FF) |
| Black text | 18.93:1 |
| White text | 1.10:1 |
Values
| HEX | #EFF3FF |
| RGB | rgb(239, 243, 255) |
| HSL | hsl(225, 100%, 97%) |
| OKLCH | oklch(96.5% 0.017 271.2) |
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 #EFF3FF | 1.10:1 | Fails | Lc 0.0 | Not readable |
| Black text on #EFF3FF | 18.93:1 | AAA | Lc 98.9 | Preferred for body text |
| #EFF3FF text on white | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #EFF3FF text on black | 18.93:1 | AAA | Lc -100.0 | 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)
#EFF3FF
oklch(96.5% 0.017 271.2)
-
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
#BBC0CF
oklch(80.8% 0.022 271.1)
-
Step 400
400
#99A0B7
oklch(70.8% 0.034 272.1)
-
Step 500
500
#8088A5
oklch(63% 0.045 273)
-
Step 600
600
#697290
oklch(55.6% 0.048 271.8)
-
Step 700
700
#57607A
oklch(49.1% 0.043 269.9)
-
Step 800
800
#474E63
oklch(42.6% 0.036 270.4)
-
Step 900
900
#3C4151
oklch(37.7% 0.028 271.4)
-
Step 950
950
#23262F
oklch(26.9% 0.017 270.7)
#EFF3FF 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) | #F0F4FF | 0.003 |
| Deuteranopia (no green cones) | #EFF2FF | 0.003 |
| Tritanopia (no blue cones) | #ECF5F7 | 0.014 |
| Achromatopsia (no color) | #F3F3F3 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EFF3FF
#EFF3FF
oklch(96.5% 0.017 271.2)
- #F7F3E7
#F7F3E7
oklch(96.4% 0.016 91.6)
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 #EFF3FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Alice Blue #F0F8FF ΔE 0.013
- Anti-Flash White #EDF2F4 ΔE 0.015
- White Smoke #F5F5F5 ΔE 0.018
- Ghost White #F8F8FF ΔE 0.018
- Cultured #F8F9FA ΔE 0.023
- Lavender Blush #FFF0F5 ΔE 0.023
- Very Light Pink #FFF4F2 ΔE 0.027
- Snow #FFFAFA ΔE 0.031
Use #EFF3FF 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.