#DEF3F9
Closest named color: Anti-Flash White (#EDF2F4). oklch(95.1% 0.024 216.7), rgb(222, 243, 249).
Aa
Black text reads best on this color (18.29:1).
About this color
#DEF3F9 is a very light close to neutral grey. In OKLCH its lightness is 95%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Anti-Flash White (#EDF2F4), ΔE 0.019 away. Black text reads best on it, at 18.29:1.
| Hue family | Neutrals |
| Lightness | very light (95%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Anti-Flash White (#EDF2F4) |
| Black text | 18.29:1 |
| White text | 1.14:1 |
Values
| HEX | #DEF3F9 |
| RGB | rgb(222, 243, 249) |
| HSL | hsl(193, 69%, 92%) |
| OKLCH | oklch(95.1% 0.024 216.7) |
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 #DEF3F9 | 1.14:1 | Fails | Lc -8.1 | Not readable |
| Black text on #DEF3F9 | 18.29:1 | AAA | Lc 96.6 | Preferred for body text |
| #DEF3F9 text on white | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #DEF3F9 text on black | 18.29:1 | AAA | Lc -97.5 | 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 100.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100 (this color)
#DEF3F9
oklch(95.1% 0.024 216.7)
-
Step 200
200
#CDDCE0
oklch(88.4% 0.017 215.5)
-
Step 300
300
#ACC6CD
oklch(80.9% 0.03 215.8)
-
Step 400
400
#7EA9B4
oklch(70.8% 0.049 215.2)
-
Step 500
500
#5C93A2
oklch(63.1% 0.062 217)
-
Step 600
600
#407D8D
oklch(55.5% 0.068 217)
-
Step 700
700
#326A78
oklch(49.2% 0.063 216.4)
-
Step 800
800
#2A5661
oklch(42.6% 0.052 216.1)
-
Step 900
900
#274750
oklch(37.7% 0.041 217.9)
-
Step 950
950
#172A2F
oklch(27.1% 0.026 216.3)
#DEF3F9 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) | #EFF1F9 | 0.022 |
| Deuteranopia (no green cones) | #EAEEF9 | 0.019 |
| Tritanopia (no blue cones) | #D7F5F5 | 0.012 |
| Achromatopsia (no color) | #EFEFEF | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #DEF3F9
#DEF3F9
oklch(95.1% 0.024 216.7)
- #FEEAE4
#FEEAE4
oklch(95.1% 0.023 37.4)
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 #DEF3F9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Anti-Flash White #EDF2F4 ΔE 0.019
- Alice Blue #F0F8FF ΔE 0.028
- Ice Blue #D7FFFE ΔE 0.030
- Pale Blue #D0FEFE ΔE 0.030
- Very Pale Blue #D6FFFE ΔE 0.030
- Very Light Blue #D5FFFF ΔE 0.030
- Light Cyan #E0FFFF ΔE 0.030
- Really Light Blue #D4FFFF ΔE 0.030
Use #DEF3F9 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.