#819FFF
Closest named color: Periwinkle Blue (#8F99FB). oklch(72.1% 0.144 269.4), rgb(129, 159, 255).
Aa
Black text reads best on this color (8.33:1).
About this color
#819FFF is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.144 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.021 away. Black text reads best on it, at 8.33:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.33:1 |
| White text | 2.51:1 |
Values
| HEX | #819FFF |
| RGB | rgb(129, 159, 255) |
| HSL | hsl(226, 100%, 75%) |
| OKLCH | oklch(72.1% 0.144 269.4) |
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 #819FFF | 2.51:1 | Fails | Lc -54.3 | Large or bold text, headings |
| Black text on #819FFF | 8.33:1 | AAA | Lc 54.7 | Large or bold text, headings |
| #819FFF text on white | 2.51:1 | Fails | Lc 49.3 | Large or bold text, headings |
| #819FFF text on black | 8.33:1 | AAA | Lc -52.7 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#A9BFFC
oklch(81% 0.09 269)
-
Step 400
400 (this color)
#819FFF
oklch(72.1% 0.144 269.4)
-
Step 500
500
#5E7EF7
oklch(63.1% 0.184 269.4)
-
Step 600
600
#4763E6
oklch(55.5% 0.2 269.6)
-
Step 700
700
#3951C8
oklch(49% 0.186 269.5)
-
Step 800
800
#2F43A2
oklch(42.6% 0.155 269.6)
-
Step 900
900
#293A80
oklch(37.6% 0.12 269.6)
-
Step 950
950
#18234B
oklch(27.1% 0.075 269.3)
#819FFF 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) | #7AA9FF | 0.026 |
| Deuteranopia (no green cones) | #6C9EFD | 0.024 |
| Tritanopia (no blue cones) | #4BB3C3 | 0.128 |
| Achromatopsia (no color) | #A3A3A3 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819FFF
#819FFF
oklch(72.1% 0.144 269.4)
- #C99F12
#C99F12
oklch(72.1% 0.144 89.1)
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 #819FFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.021
- Cornflower Blue #6495ED ΔE 0.051
- Perrywinkle #8F8CE7 ΔE 0.054
- Lavender Blue #8B88F8 ΔE 0.057
- Carolina Blue #8AB8FE ΔE 0.069
- Chefchaouen Blue #4895EF ΔE 0.071
- Periwinkle #8E82FE ΔE 0.072
- Soft Blue #6488EA ΔE 0.076
Use #819FFF 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.