#819FEB
Closest named color: Periwinkle Blue (#8F99FB). oklch(71.1% 0.117 267), rgb(129, 159, 235).
Aa
Black text reads best on this color (8.09:1).
About this color
#819FEB is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.117 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.036 away. Black text reads best on it, at 8.09:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.09:1 |
| White text | 2.59:1 |
Values
| HEX | #819FEB |
| RGB | rgb(129, 159, 235) |
| HSL | hsl(223, 73%, 71%) |
| OKLCH | oklch(71.1% 0.117 267) |
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 #819FEB | 2.59:1 | Fails | Lc -55.7 | Large or bold text, headings |
| Black text on #819FEB | 8.09:1 | AAA | Lc 53.4 | Large or bold text, headings |
| #819FEB text on white | 2.59:1 | Fails | Lc 50.6 | Large or bold text, headings |
| #819FEB text on black | 8.09:1 | AAA | Lc -51.3 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ABC0F1
oklch(80.9% 0.073 266.7)
-
Step 400
400 (this color)
#819FEB
oklch(71.1% 0.117 267)
-
Step 500
500
#6184E3
oklch(63.2% 0.148 266.9)
-
Step 600
600
#496BD1
oklch(55.6% 0.162 267.2)
-
Step 700
700
#3A59B5
oklch(49.2% 0.15 266.8)
-
Step 800
800
#304993
oklch(42.7% 0.125 267)
-
Step 900
900
#2A3E75
oklch(37.8% 0.097 266.7)
-
Step 950
950
#192544
oklch(27.1% 0.06 266.5)
#819FEB 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) | #83A6EE | 0.019 |
| Deuteranopia (no green cones) | #799CE9 | 0.013 |
| Tritanopia (no blue cones) | #59AFBA | 0.105 |
| Achromatopsia (no color) | #A1A1A1 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819FEB
#819FEB
oklch(71.1% 0.117 267)
- #C19D42
#C19D42
oklch(71.2% 0.117 87.3)
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 #819FEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.036
- Cornflower Blue #6495ED ΔE 0.046
- Perrywinkle #8F8CE7 ΔE 0.050
- Lavender Blue #8B88F8 ΔE 0.066
- Chefchaouen Blue #4895EF ΔE 0.068
- Carolina Blue #8AB8FE ΔE 0.068
- Soft Blue #6488EA ΔE 0.074
- Pale Purple #B790D4 ΔE 0.082
Use #819FEB 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.