#818FDF
Closest named color: Perrywinkle (#8F8CE7). oklch(67.2% 0.12 275.2), rgb(129, 143, 223).
Aa
Black text reads best on this color (6.92:1).
About this color
#818FDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.120 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Perrywinkle (#8F8CE7), ΔE 0.024 away. Black text reads best on it, at 6.92:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Perrywinkle (#8F8CE7) |
| Black text | 6.92:1 |
| White text | 3.03:1 |
Values
| HEX | #818FDF |
| RGB | rgb(129, 143, 223) |
| HSL | hsl(231, 59%, 69%) |
| OKLCH | oklch(67.2% 0.12 275.2) |
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 #818FDF | 3.03:1 | AA large text | Lc -62.4 | Content text, not long reading |
| Black text on #818FDF | 6.92:1 | AA | Lc 47.1 | Large or bold text, headings |
| #818FDF text on white | 3.03:1 | AA large text | Lc 57.0 | Large or bold text, headings |
| #818FDF text on black | 6.92:1 | AA | Lc -44.8 | Non-text elements, placeholder text |
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
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D8F5
oklch(88.6% 0.041 274.8)
-
Step 300
300
#B2BDF1
oklch(80.8% 0.075 275.3)
-
Step 400
400 (this color)
#818FDF
oklch(67.2% 0.12 275.2)
-
Step 500
500
#707EE4
oklch(63% 0.153 275.2)
-
Step 600
600
#5A65D2
oklch(55.5% 0.166 275.3)
-
Step 700
700
#4A53B6
oklch(49% 0.155 275.2)
-
Step 800
800
#3D4593
oklch(42.7% 0.127 275.3)
-
Step 900
900
#333B75
oklch(37.7% 0.099 274.8)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#818FDF 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) | #7398E2 | 0.027 |
| Deuteranopia (no green cones) | #6C91DD | 0.026 |
| Tritanopia (no blue cones) | #629FAC | 0.107 |
| Achromatopsia (no color) | #949494 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FDF
#818FDF
oklch(67.2% 0.12 275.2)
- #AD9531
#AD9531
oklch(67.3% 0.12 95.3)
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 #818FDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Perrywinkle #8F8CE7 ΔE 0.024
- Cornflower Blue #6495ED ΔE 0.038
- Soft Blue #6488EA ΔE 0.046
- Lavender Blue #8B88F8 ΔE 0.046
- Periwinkle Blue #8F99FB ΔE 0.050
- Chefchaouen Blue #4895EF ΔE 0.061
- Periwinkle #8E82FE ΔE 0.063
- Dark Sky Blue #448EE4 ΔE 0.066
Use #818FDF 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.