#819CE9
Closest named color: Periwinkle Blue (#8F99FB). oklch(70.4% 0.117 268.6), rgb(129, 156, 233).
Aa
Black text reads best on this color (7.86:1).
About this color
#819CE9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.117 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.035 away. Black text reads best on it, at 7.86:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 7.86:1 |
| White text | 2.66:1 |
Values
| HEX | #819CE9 |
| RGB | rgb(129, 156, 233) |
| HSL | hsl(224, 70%, 71%) |
| OKLCH | oklch(70.4% 0.117 268.6) |
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 #819CE9 | 2.66:1 | Fails | Lc -57.0 | Large or bold text, headings |
| Black text on #819CE9 | 7.86:1 | AAA | Lc 52.2 | Large or bold text, headings |
| #819CE9 text on white | 2.66:1 | Fails | Lc 51.8 | Large or bold text, headings |
| #819CE9 text on black | 7.86:1 | AAA | Lc -50.1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ADBFF1
oklch(80.8% 0.074 269.3)
-
Step 400
400 (this color)
#819CE9
oklch(70.4% 0.117 268.6)
-
Step 500
500
#6483E4
oklch(63.2% 0.15 268.5)
-
Step 600
600
#4C6AD2
oklch(55.6% 0.164 268.5)
-
Step 700
700
#3D58B6
oklch(49.2% 0.152 268.3)
-
Step 800
800
#334893
oklch(42.7% 0.126 268.8)
-
Step 900
900
#2C3D75
oklch(37.7% 0.098 268.7)
-
Step 950
950
#1A2445
oklch(27% 0.063 269.2)
#819CE9 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) | #80A3EC | 0.018 |
| Deuteranopia (no green cones) | #769AE7 | 0.015 |
| Tritanopia (no blue cones) | #5BACB8 | 0.105 |
| Achromatopsia (no color) | #9E9E9E | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819CE9
#819CE9
oklch(70.4% 0.117 268.6)
- #BD9B3E
#BD9B3E
oklch(70.3% 0.117 88.7)
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 #819CE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.035
- Cornflower Blue #6495ED ΔE 0.041
- Perrywinkle #8F8CE7 ΔE 0.043
- Lavender Blue #8B88F8 ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.064
- Soft Blue #6488EA ΔE 0.068
- Carolina Blue #8AB8FE ΔE 0.076
- Dark Sky Blue #448EE4 ΔE 0.078
Use #819CE9 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.