#E4F3FB
Closest named color: Anti-Flash White (#EDF2F4). oklch(95.5% 0.019 230.7), rgb(228, 243, 251).
Aa
Black text reads best on this color (18.51:1).
About this color
#E4F3FB 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 0.014 away. Black text reads best on it, at 18.51:1.
| Hue family | Neutrals |
| Lightness | very light (96%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Anti-Flash White (#EDF2F4) |
| Black text | 18.51:1 |
| White text | 1.13:1 |
Values
| HEX | #E4F3FB |
| RGB | rgb(228, 243, 251) |
| HSL | hsl(201, 74%, 94%) |
| OKLCH | oklch(95.5% 0.019 230.7) |
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 #E4F3FB | 1.13:1 | Fails | Lc 0.0 | Not readable |
| Black text on #E4F3FB | 18.51:1 | AAA | Lc 97.4 | Preferred for body text |
| #E4F3FB text on white | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #E4F3FB text on black | 18.51:1 | AAA | Lc -98.4 | 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)
#E4F3FB
oklch(95.5% 0.019 230.7)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE1
oklch(88.5% 0.015 231.2)
-
Step 300
300
#B1C4CE
oklch(80.9% 0.025 230.5)
-
Step 400
400
#88A6B5
oklch(70.8% 0.04 229.6)
-
Step 500
500
#6A90A3
oklch(63.2% 0.051 230.2)
-
Step 600
600
#517A8E
oklch(55.7% 0.055 230.1)
-
Step 700
700
#426679
oklch(49.1% 0.051 232.3)
-
Step 800
800
#365362
oklch(42.6% 0.043 231.6)
-
Step 900
900
#2F4550
oklch(37.7% 0.033 230.4)
-
Step 950
950
#1C282F
oklch(26.9% 0.021 234.2)
#E4F3FB 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) | #EFF2FB | 0.014 |
| Deuteranopia (no green cones) | #ECEFFB | 0.014 |
| Tritanopia (no blue cones) | #DEF5F5 | 0.014 |
| Achromatopsia (no color) | #F1F1F1 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E4F3FB
#E4F3FB
oklch(95.5% 0.019 230.7)
- #FCEDE5
#FCEDE5
oklch(95.6% 0.02 50.2)
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 #E4F3FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Anti-Flash White #EDF2F4 ΔE 0.014
- Alice Blue #F0F8FF ΔE 0.021
- White Smoke #F5F5F5 ΔE 0.024
- Light Cyan #E0FFFF ΔE 0.030
- Ghost White #F8F8FF ΔE 0.030
- Cultured #F8F9FA ΔE 0.032
- Ice Blue #D7FFFE ΔE 0.032
- Very Pale Blue #D6FFFE ΔE 0.033
Use #E4F3FB 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.