#EFFDF9
Closest named color: Azure (#F0FFFF). oklch(98.3% 0.016 177.1), rgb(239, 253, 249).
Aa
Black text reads best on this color (20.08:1).
About this color
#EFFDF9 is a very light close to neutral grey. In OKLCH its lightness is 98%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Azure (#F0FFFF), ΔE 0.008 away. Black text reads best on it, at 20.08:1.
| Hue family | Neutrals |
| Lightness | very light (98%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Azure (#F0FFFF) |
| Black text | 20.08:1 |
| White text | 1.04:1 |
Values
| HEX | #EFFDF9 |
| RGB | rgb(239, 253, 249) |
| HSL | hsl(163, 78%, 96%) |
| OKLCH | oklch(98.3% 0.016 177.1) |
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 #EFFDF9 | 1.04:1 | Fails | Lc 0.0 | Not readable |
| Black text on #EFFDF9 | 20.08:1 | AAA | Lc 102.9 | Preferred for body text |
| #EFFDF9 text on white | 1.04:1 | Fails | Lc 0.0 | Not readable |
| #EFFDF9 text on black | 20.08:1 | AAA | Lc -104.5 | 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)
#EFFDF9
oklch(98.3% 0.016 177.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DCD9
oklch(88.6% 0.012 176.3)
-
Step 300
300
#B4C5C0
oklch(80.9% 0.02 176.3)
-
Step 400
400
#8CA7A0
oklch(70.6% 0.032 177.9)
-
Step 500
500
#6F9289
oklch(63.1% 0.041 177.4)
-
Step 600
600
#577C73
oklch(55.6% 0.044 177.8)
-
Step 700
700
#476960
oklch(49.2% 0.042 176.1)
-
Step 800
800
#3A554F
oklch(42.6% 0.034 179.2)
-
Step 900
900
#324641
oklch(37.6% 0.027 177.7)
-
Step 950
950
#1E2926
oklch(26.9% 0.016 176.5)
#EFFDF9 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) | #FCFBF9 | 0.017 |
| Deuteranopia (no green cones) | #F9F9F9 | 0.016 |
| Tritanopia (no blue cones) | #ECFDFC | 0.005 |
| Achromatopsia (no color) | #FAFAFA | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EFFDF9
#EFFDF9
oklch(98.3% 0.016 177.1)
- #FFF7F9
#FFF7F9
oklch(98.3% 0.009 0.1)
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 #EFFDF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azure #F0FFFF ΔE 0.008
- Mint Cream #F5FFFA ΔE 0.010
- Honeydew #F0FFF0 ΔE 0.015
- Cultured #F8F9FA ΔE 0.015
- Alice Blue #F0F8FF ΔE 0.017
- Light Cyan #E0FFFF ΔE 0.019
- Pale Grey #FDFDFE ΔE 0.020
- White Smoke #F5F5F5 ΔE 0.020
Use #EFFDF9 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.