#818BD2
Closest named color: Perrywinkle (#8F8CE7). oklch(65.8% 0.106 276.9), rgb(129, 139, 210).
Aa
Black text reads best on this color (6.55:1).
About this color
#818BD2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.106 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Perrywinkle (#8F8CE7), ΔE 0.038 away. Black text reads best on it, at 6.55:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Perrywinkle (#8F8CE7) |
| Black text | 6.55:1 |
| White text | 3.20:1 |
Values
| HEX | #818BD2 |
| RGB | rgb(129, 139, 210) |
| HSL | hsl(233, 47%, 66%) |
| OKLCH | oklch(65.8% 0.106 276.9) |
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 #818BD2 | 3.20:1 | AA large text | Lc -64.6 | Content text, not long reading |
| Black text on #818BD2 | 6.55:1 | AA | Lc 44.9 | Non-text elements, placeholder text |
| #818BD2 text on white | 3.20:1 | AA large text | Lc 59.2 | Large or bold text, headings |
| #818BD2 text on black | 6.55:1 | AA | Lc -42.6 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D4D8ED
oklch(88.6% 0.029 277.2)
-
Step 300
300
#B7BEE3
oklch(80.8% 0.053 276.7)
-
Step 400
400
#939CD5
oklch(70.7% 0.084 277.1)
-
Step 500
500 (this color)
#818BD2
oklch(65.8% 0.106 276.9)
-
Step 600
600
#636BB6
oklch(55.5% 0.116 277.3)
-
Step 700
700
#52599D
oklch(49.1% 0.108 277.2)
-
Step 800
800
#43497F
oklch(42.6% 0.089 277.1)
-
Step 900
900
#383E66
oklch(37.8% 0.069 276.1)
-
Step 950
950
#21243C
oklch(27% 0.045 277.5)
#818BD2 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) | #7493D5 | 0.025 |
| Deuteranopia (no green cones) | #6E8DD0 | 0.025 |
| Tritanopia (no blue cones) | #6999A5 | 0.094 |
| Achromatopsia (no color) | #909090 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818BD2
#818BD2
oklch(65.8% 0.106 276.9)
- #A4913D
#A4913D
oklch(65.7% 0.106 96.6)
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 #818BD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Perrywinkle #8F8CE7 ΔE 0.038
- Cornflower Blue #6495ED ΔE 0.051
- Faded Blue #658CBB ΔE 0.052
- Soft Blue #6488EA ΔE 0.052
- Lavender Blue #8B88F8 ΔE 0.061
- Wisteria #A87DC2 ΔE 0.065
- Silver Lake Blue #778DA9 ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.068
Use #818BD2 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.