#818DCD
Closest named color: Perrywinkle (#8F8CE7). oklch(65.9% 0.096 275.3), rgb(129, 141, 205).
Aa
Black text reads best on this color (6.62:1).
About this color
#818DCD is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.096 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Perrywinkle (#8F8CE7), ΔE 0.045 away. Black text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Perrywinkle (#8F8CE7) |
| Black text | 6.62:1 |
| White text | 3.16:1 |
Values
| HEX | #818DCD |
| RGB | rgb(129, 141, 205) |
| HSL | hsl(231, 43%, 65%) |
| OKLCH | oklch(65.9% 0.096 275.3) |
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 #818DCD | 3.16:1 | AA large text | Lc -64.2 | Content text, not long reading |
| Black text on #818DCD | 6.62:1 | AA | Lc 45.3 | Large or bold text, headings |
| #818DCD text on white | 3.16:1 | AA large text | Lc 58.8 | Large or bold text, headings |
| #818DCD text on black | 6.62:1 | AA | Lc -42.9 | 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
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EB
oklch(88.5% 0.026 276.4)
-
Step 300
300
#B7BFE0
oklch(80.9% 0.047 274.6)
-
Step 400
400
#939DD0
oklch(70.7% 0.076 275.7)
-
Step 500
500 (this color)
#818DCD
oklch(65.9% 0.096 275.3)
-
Step 600
600
#626DB0
oklch(55.5% 0.105 275.4)
-
Step 700
700
#515B98
oklch(49.1% 0.098 275.1)
-
Step 800
800
#434B7B
oklch(42.8% 0.08 275.3)
-
Step 900
900
#383E63
oklch(37.6% 0.064 275.9)
-
Step 950
950
#21253A
oklch(27.1% 0.04 275.2)
#818DCD 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) | #7894D0 | 0.020 |
| Deuteranopia (no green cones) | #738ECB | 0.019 |
| Tritanopia (no blue cones) | #6B99A4 | 0.085 |
| Achromatopsia (no color) | #919191 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818DCD
#818DCD
oklch(65.9% 0.096 275.3)
- #A49148
#A49148
oklch(65.8% 0.096 95)
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 #818DCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Perrywinkle #8F8CE7 ΔE 0.045
- Faded Blue #658CBB ΔE 0.046
- Cornflower Blue #6495ED ΔE 0.055
- Silver Lake Blue #778DA9 ΔE 0.058
- Soft Blue #6488EA ΔE 0.060
- Wisteria #A87DC2 ΔE 0.066
- Heather #A484AC ΔE 0.067
- Cool Gray #8D99AE ΔE 0.067
Use #818DCD 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.