#818FC0
Closest named color: Silver Lake Blue (#778DA9). oklch(65.7% 0.075 271.9), rgb(129, 143, 192).
Aa
Black text reads best on this color (6.62:1).
About this color
#818FC0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.075 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.038 away. Black text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.62:1 |
| White text | 3.17:1 |
Values
| HEX | #818FC0 |
| RGB | rgb(129, 143, 192) |
| HSL | hsl(227, 33%, 63%) |
| OKLCH | oklch(65.7% 0.075 271.9) |
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 #818FC0 | 3.17:1 | AA large text | Lc -64.2 | Content text, not long reading |
| Black text on #818FC0 | 6.62:1 | AA | Lc 45.2 | Large or bold text, headings |
| #818FC0 text on white | 3.17:1 | AA large text | Lc 58.8 | Large or bold text, headings |
| #818FC0 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E7
oklch(88.6% 0.02 270.2)
-
Step 300
300
#B8C0D9
oklch(81% 0.036 271.5)
-
Step 400
400
#939FC6
oklch(70.7% 0.059 271.5)
-
Step 500
500 (this color)
#818FC0
oklch(65.7% 0.075 271.9)
-
Step 600
600
#6270A3
oklch(55.5% 0.081 271.8)
-
Step 700
700
#515E8C
oklch(49.1% 0.076 271.3)
-
Step 800
800
#434D72
oklch(42.8% 0.063 272)
-
Step 900
900
#38405C
oklch(37.7% 0.049 271.6)
-
Step 950
950
#212636
oklch(27.1% 0.031 270.8)
#818FC0 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) | #8093C2 | 0.011 |
| Deuteranopia (no green cones) | #7B8EBF | 0.009 |
| Tritanopia (no blue cones) | #6F98A0 | 0.067 |
| Achromatopsia (no color) | #919191 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FC0
#818FC0
oklch(65.7% 0.075 271.9)
- #A2905B
#A2905B
oklch(65.7% 0.075 91.4)
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 #818FC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.038
- Faded Blue #658CBB ΔE 0.038
- Blue Grey #758DA3 ΔE 0.048
- Cool Gray #8D99AE ΔE 0.048
- Heather #A484AC ΔE 0.058
- Greyblue #77A1B5 ΔE 0.058
- Light Slate Gray #778899 ΔE 0.061
- Bluey Grey #89A0B0 ΔE 0.061
Use #818FC0 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.