#819DFD
Closest named color: Periwinkle Blue (#8F99FB). oklch(71.6% 0.144 270.2), rgb(129, 157, 253).
Aa
Black text reads best on this color (8.17:1).
About this color
#819DFD is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.144 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 8.17:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.17:1 |
| White text | 2.56:1 |
Values
| HEX | #819DFD |
| RGB | rgb(129, 157, 253) |
| HSL | hsl(226, 97%, 75%) |
| OKLCH | oklch(71.6% 0.144 270.2) |
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 #819DFD | 2.56:1 | Fails | Lc -55.2 | Large or bold text, headings |
| Black text on #819DFD | 8.17:1 | AAA | Lc 53.9 | Large or bold text, headings |
| #819DFD text on white | 2.56:1 | Fails | Lc 50.1 | Large or bold text, headings |
| #819DFD text on black | 8.17:1 | AAA | Lc -51.8 | 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
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#AABEFB
oklch(80.8% 0.089 270.3)
-
Step 400
400 (this color)
#819DFD
oklch(71.6% 0.144 270.2)
-
Step 500
500
#607DF7
oklch(63% 0.184 270.3)
-
Step 600
600
#4963E6
oklch(55.6% 0.2 270.1)
-
Step 700
700
#3B51C8
oklch(49.1% 0.186 270.1)
-
Step 800
800
#3143A2
oklch(42.7% 0.154 270.4)
-
Step 900
900
#2A3A80
oklch(37.7% 0.119 270.1)
-
Step 950
950
#19234B
oklch(27.1% 0.075 270.2)
#819DFD 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) | #78A7FF | 0.026 |
| Deuteranopia (no green cones) | #6B9CFB | 0.026 |
| Tritanopia (no blue cones) | #4DB1C1 | 0.128 |
| Achromatopsia (no color) | #A1A1A1 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819DFD
#819DFD
oklch(71.6% 0.144 270.2)
- #C69E0F
#C69E0F
oklch(71.6% 0.144 90.1)
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 #819DFD, 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 0.047
- Perrywinkle #8F8CE7 ΔE 0.049
- Lavender Blue #8B88F8 ΔE 0.052
- Periwinkle #8E82FE ΔE 0.068
- Chefchaouen Blue #4895EF ΔE 0.068
- Soft Blue #6488EA ΔE 0.071
- Carolina Blue #8AB8FE ΔE 0.073
Use #819DFD 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.