#EFF1FF
Closest named color: Anti-Flash White (#EDF2F4). oklch(96.1% 0.019 279.5), rgb(239, 241, 255).
Aa
Black text reads best on this color (18.69:1).
About this color
#EFF1FF is a very light close to neutral grey. In OKLCH its lightness is 96%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Anti-Flash White (#EDF2F4), ΔE 0.017 away. Black text reads best on it, at 18.69:1.
| Hue family | Neutrals |
| Lightness | very light (96%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Anti-Flash White (#EDF2F4) |
| Black text | 18.69:1 |
| White text | 1.12:1 |
Values
| HEX | #EFF1FF |
| RGB | rgb(239, 241, 255) |
| HSL | hsl(233, 100%, 97%) |
| OKLCH | oklch(96.1% 0.019 279.5) |
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 #EFF1FF | 1.12:1 | Fails | Lc 0.0 | Not readable |
| Black text on #EFF1FF | 18.69:1 | AAA | Lc 98.1 | Preferred for body text |
| #EFF1FF text on white | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #EFF1FF text on black | 18.69:1 | AAA | Lc -99.1 | 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)
#EFF1FF
oklch(96.1% 0.019 279.5)
-
Step 100
100
#E9E9EF
oklch(93.6% 0.008 286.2)
-
Step 200
200
#D7D8E2
oklch(88.4% 0.014 281.5)
-
Step 300
300
#BDBFD0
oklch(80.8% 0.024 280.5)
-
Step 400
400
#9B9FB9
oklch(70.8% 0.038 278.5)
-
Step 500
500
#8387A8
oklch(63.2% 0.05 279.5)
-
Step 600
600
#6C7093
oklch(55.5% 0.054 279.4)
-
Step 700
700
#5B5E7D
oklch(49.2% 0.05 280.1)
-
Step 800
800
#4A4D66
oklch(42.8% 0.042 279.2)
-
Step 900
900
#3E4053
oklch(37.7% 0.033 280)
-
Step 950
950
#242530
oklch(26.8% 0.02 280.8)
#EFF1FF 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) | #EEF2FF | 0.003 |
| Deuteranopia (no green cones) | #EDF1FF | 0.003 |
| Tritanopia (no blue cones) | #ECF3F5 | 0.017 |
| Achromatopsia (no color) | #F2F2F2 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EFF1FF
#EFF1FF
oklch(96.1% 0.019 279.5)
- #F5F3E4
#F5F3E4
oklch(96.2% 0.02 100.6)
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 #EFF1FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Anti-Flash White #EDF2F4 ΔE 0.017
- Alice Blue #F0F8FF ΔE 0.018
- White Smoke #F5F5F5 ΔE 0.021
- Ghost White #F8F8FF ΔE 0.023
- Lavender Blush #FFF0F5 ΔE 0.024
- Cultured #F8F9FA ΔE 0.027
- Very Light Pink #FFF4F2 ΔE 0.030
- Lavender #E6E6FA ΔE 0.031
Use #EFF1FF 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.