#819DF0
Closest named color: Periwinkle Blue (#8F99FB). oklch(70.9% 0.126 268.9), rgb(129, 157, 240).
Aa
Black text reads best on this color (8.01:1).
About this color
#819DF0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.126 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.027 away. Black text reads best on it, at 8.01:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.01:1 |
| White text | 2.62:1 |
Values
| HEX | #819DF0 |
| RGB | rgb(129, 157, 240) |
| HSL | hsl(225, 79%, 72%) |
| OKLCH | oklch(70.9% 0.126 268.9) |
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 #819DF0 | 2.62:1 | Fails | Lc -56.2 | Large or bold text, headings |
| Black text on #819DF0 | 8.01:1 | AAA | Lc 53.0 | Large or bold text, headings |
| #819DF0 text on white | 2.62:1 | Fails | Lc 51.0 | Large or bold text, headings |
| #819DF0 text on black | 8.01:1 | AAA | Lc -50.9 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ACBFF4
oklch(80.9% 0.078 269.3)
-
Step 400
400 (this color)
#819DF0
oklch(70.9% 0.126 268.9)
-
Step 500
500
#6281EA
oklch(63.1% 0.161 269)
-
Step 600
600
#4A68D8
oklch(55.6% 0.175 268.8)
-
Step 700
700
#3C56BB
oklch(49.1% 0.162 268.8)
-
Step 800
800
#314798
oklch(42.7% 0.135 268.7)
-
Step 900
900
#2B3C79
oklch(37.7% 0.106 269.1)
-
Step 950
950
#192447
oklch(27.1% 0.067 268.5)
#819DF0 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) | #7EA5F3 | 0.020 |
| Deuteranopia (no green cones) | #739BEE | 0.018 |
| Tritanopia (no blue cones) | #56AEBB | 0.113 |
| Achromatopsia (no color) | #A0A0A0 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819DF0
#819DF0
oklch(70.9% 0.126 268.9)
- #C19C34
#C19C34
oklch(70.8% 0.126 88.6)
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 #819DF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.027
- Cornflower Blue #6495ED ΔE 0.042
- Perrywinkle #8F8CE7 ΔE 0.044
- Lavender Blue #8B88F8 ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.065
- Soft Blue #6488EA ΔE 0.069
- Carolina Blue #8AB8FE ΔE 0.072
- Periwinkle #8E82FE ΔE 0.075
Use #819DF0 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.