#818CDC
Closest named color: Perrywinkle (#8F8CE7). oklch(66.5% 0.119 276.7), rgb(129, 140, 220).
Aa
Black text reads best on this color (6.71:1).
About this color
#818CDC is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.119 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Perrywinkle (#8F8CE7), ΔE 0.026 away. Black text reads best on it, at 6.71:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Perrywinkle (#8F8CE7) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #818CDC |
| RGB | rgb(129, 140, 220) |
| HSL | hsl(233, 57%, 68%) |
| OKLCH | oklch(66.5% 0.119 276.7) |
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 #818CDC | 3.12:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #818CDC | 6.71:1 | AA | Lc 45.8 | Large or bold text, headings |
| #818CDC text on white | 3.12:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #818CDC text on black | 6.71:1 | AA | Lc -43.5 | 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 500.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B6BEE7
oklch(80.9% 0.059 276.4)
-
Step 400
400
#919BDB
oklch(70.6% 0.094 276.9)
-
Step 500
500 (this color)
#818CDC
oklch(66.5% 0.119 276.7)
-
Step 600
600
#616ABE
oklch(55.7% 0.13 276.7)
-
Step 700
700
#5058A4
oklch(49.2% 0.121 276.5)
-
Step 800
800
#424885
oklch(42.7% 0.1 277)
-
Step 900
900
#373D6A
oklch(37.7% 0.077 276.3)
-
Step 950
950
#20243E
oklch(27% 0.049 276)
#818CDC 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) | #7095DF | 0.029 |
| Deuteranopia (no green cones) | #6A8EDA | 0.029 |
| Tritanopia (no blue cones) | #649CAA | 0.105 |
| Achromatopsia (no color) | #929292 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818CDC
#818CDC
oklch(66.5% 0.119 276.7)
- #A9932F
#A9932F
oklch(66.5% 0.119 96.4)
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 #818CDC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Perrywinkle #8F8CE7 ΔE 0.026
- Cornflower Blue #6495ED ΔE 0.042
- Soft Blue #6488EA ΔE 0.044
- Lavender Blue #8B88F8 ΔE 0.047
- Periwinkle Blue #8F99FB ΔE 0.057
- Periwinkle #8E82FE ΔE 0.063
- Faded Blue #658CBB ΔE 0.064
- Chefchaouen Blue #4895EF ΔE 0.064
Use #818CDC 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.