#EFFEFF
Closest named color: Azure (#F0FFFF). oklch(98.6% 0.016 201.7), rgb(239, 254, 255).
Aa
Black text reads best on this color (20.29:1).
About this color
#EFFEFF is a very light close to neutral grey. In OKLCH its lightness is 99%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Azure (#F0FFFF), ΔE 0.003 away. Black text reads best on it, at 20.29:1.
| Hue family | Neutrals |
| Lightness | very light (99%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Azure (#F0FFFF) |
| Black text | 20.29:1 |
| White text | 1.03:1 |
Values
| HEX | #EFFEFF |
| RGB | rgb(239, 254, 255) |
| HSL | hsl(184, 100%, 97%) |
| OKLCH | oklch(98.6% 0.016 201.7) |
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 #EFFEFF | 1.03:1 | Fails | Lc 0.0 | Not readable |
| Black text on #EFFEFF | 20.29:1 | AAA | Lc 103.6 | Preferred for body text |
| #EFFEFF text on white | 1.03:1 | Fails | Lc 0.0 | Not readable |
| #EFFEFF text on black | 20.29:1 | AAA | Lc -105.2 | 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)
#EFFEFF
oklch(98.6% 0.016 201.7)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B2C5C6
oklch(80.9% 0.021 200.6)
-
Step 400
400
#8AA7A9
oklch(70.7% 0.032 201.6)
-
Step 500
500
#6C9194
oklch(63% 0.041 202.4)
-
Step 600
600
#537C7E
oklch(55.7% 0.046 199.8)
-
Step 700
700
#43686B
oklch(49.1% 0.042 202.3)
-
Step 800
800
#385557
oklch(42.7% 0.035 201.4)
-
Step 900
900
#304648
oklch(37.7% 0.028 203.1)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#EFFEFF 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) | #FCFCFF | 0.017 |
| Deuteranopia (no green cones) | #F8FAFF | 0.015 |
| Tritanopia (no blue cones) | #EBFFFE | 0.006 |
| Achromatopsia (no color) | #FBFBFB | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EFFEFF
#EFFEFF
oklch(98.6% 0.016 201.7)
- #FFF9F8
#FFF9F8
oklch(98.6% 0.007 28.8)
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 #EFFEFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azure #F0FFFF ΔE 0.003
- Mint Cream #F5FFFA ΔE 0.011
- Cultured #F8F9FA ΔE 0.015
- Alice Blue #F0F8FF ΔE 0.015
- Pale Grey #FDFDFE ΔE 0.018
- Ghost White #F8F8FF ΔE 0.018
- Light Cyan #E0FFFF ΔE 0.018
- White #FFFFFF ΔE 0.021
Use #EFFEFF 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.