#819EFF
Closest named color: Periwinkle Blue (#8F99FB). oklch(71.9% 0.145 269.9), rgb(129, 158, 255).
Aa
Black text reads best on this color (8.26:1).
About this color
#819EFF is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.145 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 8.26:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.26:1 |
| White text | 2.53:1 |
Values
| HEX | #819EFF |
| RGB | rgb(129, 158, 255) |
| HSL | hsl(226, 100%, 75%) |
| OKLCH | oklch(71.9% 0.145 269.9) |
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 #819EFF | 2.53:1 | Fails | Lc -54.7 | Large or bold text, headings |
| Black text on #819EFF | 8.26:1 | AAA | Lc 54.4 | Large or bold text, headings |
| #819EFF text on white | 2.53:1 | Fails | Lc 49.6 | Large or bold text, headings |
| #819EFF text on black | 8.26:1 | AAA | Lc -52.3 | 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
#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
#A9BEFC
oklch(80.8% 0.091 269.8)
-
Step 400
400 (this color)
#819EFF
oklch(71.9% 0.145 269.9)
-
Step 500
500
#5F7DF8
oklch(63% 0.186 270)
-
Step 600
600
#4863E7
oklch(55.6% 0.201 269.8)
-
Step 700
700
#3A51C9
oklch(49.2% 0.187 269.8)
-
Step 800
800
#3043A2
oklch(42.7% 0.155 270)
-
Step 900
900
#293A81
oklch(37.7% 0.121 269.6)
-
Step 950
950
#18234B
oklch(27.1% 0.075 269.3)
#819EFF 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) | #78A8FF | 0.027 |
| Deuteranopia (no green cones) | #6B9DFD | 0.026 |
| Tritanopia (no blue cones) | #4BB3C2 | 0.131 |
| Achromatopsia (no color) | #A2A2A2 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819EFF
#819EFF
oklch(71.9% 0.145 269.9)
- #C89F0A
#C89F0A
oklch(72% 0.145 89.9)
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 #819EFF, 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 0.050
- Perrywinkle #8F8CE7 ΔE 0.053
- Lavender Blue #8B88F8 ΔE 0.054
- Periwinkle #8E82FE ΔE 0.069
- Chefchaouen Blue #4895EF ΔE 0.070
- Carolina Blue #8AB8FE ΔE 0.071
- Soft Blue #6488EA ΔE 0.074
Use #819EFF 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.