#819DFF
Closest named color: Periwinkle Blue (#8F99FB). oklch(71.7% 0.146 270.3), rgb(129, 157, 255).
Aa
Black text reads best on this color (8.20:1).
About this color
#819DFF is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.146 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.019 away. Black text reads best on it, at 8.20:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.20:1 |
| White text | 2.56:1 |
Values
| HEX | #819DFF |
| RGB | rgb(129, 157, 255) |
| HSL | hsl(227, 100%, 75%) |
| OKLCH | oklch(71.7% 0.146 270.3) |
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 #819DFF | 2.56:1 | Fails | Lc -55.1 | Large or bold text, headings |
| Black text on #819DFF | 8.20:1 | AAA | Lc 54.0 | Large or bold text, headings |
| #819DFF text on white | 2.56:1 | Fails | Lc 50.0 | Large or bold text, headings |
| #819DFF text on black | 8.20:1 | AAA | Lc -52.0 | 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
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#AABEFD
oklch(80.9% 0.092 270.6)
-
Step 400
400 (this color)
#819DFF
oklch(71.7% 0.146 270.3)
-
Step 500
500
#607DF9
oklch(63.1% 0.187 270.3)
-
Step 600
600
#4962E8
oklch(55.6% 0.204 270.3)
-
Step 700
700
#3B50CA
oklch(49.1% 0.19 270.3)
-
Step 800
800
#3143A3
oklch(42.8% 0.156 270.4)
-
Step 900
900
#2A3A81
oklch(37.8% 0.121 270.1)
-
Step 950
950
#18224C
oklch(26.9% 0.079 270.3)
#819DFF 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) | #77A8FF | 0.029 |
| Deuteranopia (no green cones) | #6A9DFD | 0.026 |
| Tritanopia (no blue cones) | #4BB2C2 | 0.131 |
| Achromatopsia (no color) | #A2A2A2 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819DFF
#819DFF
oklch(71.7% 0.146 270.3)
- #C79E01
#C79E01
oklch(71.7% 0.146 90)
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 #819DFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.019
- Cornflower Blue #6495ED ΔE 0.048
- Perrywinkle #8F8CE7 ΔE 0.051
- Lavender Blue #8B88F8 ΔE 0.052
- Periwinkle #8E82FE ΔE 0.067
- Chefchaouen Blue #4895EF ΔE 0.069
- Soft Blue #6488EA ΔE 0.072
- Carolina Blue #8AB8FE ΔE 0.074
Use #819DFF 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.