#819EFB
Closest named color: Periwinkle Blue (#8F99FB). oklch(71.7% 0.14 269.5), rgb(129, 158, 251).
Aa
Black text reads best on this color (8.21:1).
About this color
#819EFB is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.140 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.020 away. Black text reads best on it, at 8.21:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.21:1 |
| White text | 2.55:1 |
Values
| HEX | #819EFB |
| RGB | rgb(129, 158, 251) |
| HSL | hsl(226, 94%, 75%) |
| OKLCH | oklch(71.7% 0.14 269.5) |
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 #819EFB | 2.55:1 | Fails | Lc -55.0 | Large or bold text, headings |
| Black text on #819EFB | 8.21:1 | AAA | Lc 54.1 | Large or bold text, headings |
| #819EFB text on white | 2.55:1 | Fails | Lc 49.9 | Large or bold text, headings |
| #819EFB text on black | 8.21:1 | 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
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD8FA
oklch(88.4% 0.049 270)
-
Step 300
300
#AABFFA
oklch(81% 0.087 269.2)
-
Step 400
400 (this color)
#819EFB
oklch(71.7% 0.14 269.5)
-
Step 500
500
#5F7FF4
oklch(63.1% 0.178 269.3)
-
Step 600
600
#4864E3
oklch(55.5% 0.195 269.6)
-
Step 700
700
#3A52C5
oklch(49% 0.181 269.5)
-
Step 800
800
#30449F
oklch(42.6% 0.149 269.6)
-
Step 900
900
#2A3B7F
oklch(37.8% 0.117 269.5)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#819EFB 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) | #7AA8FF | 0.026 |
| Deuteranopia (no green cones) | #6E9DF9 | 0.023 |
| Tritanopia (no blue cones) | #4EB2C1 | 0.125 |
| Achromatopsia (no color) | #A2A2A2 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819EFB
#819EFB
oklch(71.7% 0.14 269.5)
- #C69E1D
#C69E1D
oklch(71.6% 0.14 89.4)
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 #819EFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.020
- Cornflower Blue #6495ED ΔE 0.047
- Perrywinkle #8F8CE7 ΔE 0.050
- Lavender Blue #8B88F8 ΔE 0.055
- Chefchaouen Blue #4895EF ΔE 0.068
- Carolina Blue #8AB8FE ΔE 0.070
- Periwinkle #8E82FE ΔE 0.071
- Soft Blue #6488EA ΔE 0.073
Use #819EFB 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.