#8399EF
Closest named color: Periwinkle Blue (#8F99FB). oklch(70.2% 0.129 271.9), rgb(131, 153, 239).
Aa
Black text reads best on this color (7.76:1).
About this color
#8399EF is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.129 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.024 away. Black text reads best on it, at 7.76:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 7.76:1 |
| White text | 2.70:1 |
Values
| HEX | #8399EF |
| RGB | rgb(131, 153, 239) |
| HSL | hsl(228, 77%, 73%) |
| OKLCH | oklch(70.2% 0.129 271.9) |
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 #8399EF | 2.70:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #8399EF | 7.76:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #8399EF text on white | 2.70:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #8399EF text on black | 7.76:1 | AAA | Lc -49.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F8
oklch(88.5% 0.045 271.7)
-
Step 300
300
#AEBEF5
oklch(80.9% 0.08 271.9)
-
Step 400
400 (this color)
#8399EF
oklch(70.2% 0.129 271.9)
-
Step 500
500
#687FEC
oklch(63.1% 0.165 272)
-
Step 600
600
#5165DA
oklch(55.5% 0.179 272)
-
Step 700
700
#4253BD
oklch(49% 0.167 271.9)
-
Step 800
800
#364599
oklch(42.7% 0.138 271.7)
-
Step 900
900
#2E3B7A
oklch(37.7% 0.108 271.6)
-
Step 950
950
#1B2347
oklch(27% 0.068 271.8)
#8399EF 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) | #7AA2F2 | 0.024 |
| Deuteranopia (no green cones) | #7099ED | 0.023 |
| Tritanopia (no blue cones) | #5CABB9 | 0.115 |
| Achromatopsia (no color) | #9D9D9D | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8399EF
#8399EF
oklch(70.2% 0.129 271.9)
- #BC9C2D
#BC9C2D
oklch(70.3% 0.129 92.1)
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 #8399EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.024
- Perrywinkle #8F8CE7 ΔE 0.035
- Cornflower Blue #6495ED ΔE 0.039
- Lavender Blue #8B88F8 ΔE 0.048
- Soft Blue #6488EA ΔE 0.062
- Chefchaouen Blue #4895EF ΔE 0.064
- Periwinkle #8E82FE ΔE 0.066
- Dark Sky Blue #448EE4 ΔE 0.078
Use #8399EF 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.