#818BBC
Closest named color: Silver Lake Blue (#778DA9). oklch(64.7% 0.074 275.2), rgb(129, 139, 188).
Aa
Black text reads best on this color (6.35:1).
About this color
#818BBC is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.074 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.035 away. Black text reads best on it, at 6.35:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.35:1 |
| White text | 3.30:1 |
Values
| HEX | #818BBC |
| RGB | rgb(129, 139, 188) |
| HSL | hsl(230, 31%, 62%) |
| OKLCH | oklch(64.7% 0.074 275.2) |
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 #818BBC | 3.30:1 | AA large text | Lc -65.9 | Content text, not long reading |
| Black text on #818BBC | 6.35:1 | AA | Lc 43.6 | Non-text elements, placeholder text |
| #818BBC text on white | 3.30:1 | AA large text | Lc 60.4 | Content text, not long reading |
| #818BBC text on black | 6.35:1 | AA | Lc -41.3 | 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
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D5D8E7
oklch(88.4% 0.021 276.9)
-
Step 300
300
#B9BFD9
oklch(80.8% 0.037 275.2)
-
Step 400
400
#969EC5
oklch(70.7% 0.058 275.8)
-
Step 500
500 (this color)
#818BBC
oklch(64.7% 0.074 275.2)
-
Step 600
600
#666FA3
oklch(55.6% 0.082 275.9)
-
Step 700
700
#545D8B
oklch(49.1% 0.075 274.9)
-
Step 800
800
#454C71
oklch(42.7% 0.062 275.3)
-
Step 900
900
#3A405B
oklch(37.8% 0.047 274.3)
-
Step 950
950
#222536
oklch(27% 0.032 276.3)
#818BBC 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) | #7C90BE | 0.014 |
| Deuteranopia (no green cones) | #788BBB | 0.012 |
| Tritanopia (no blue cones) | #71949C | 0.066 |
| Achromatopsia (no color) | #8D8D8D | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818BBC
#818BBC
oklch(64.7% 0.074 275.2)
- #9C8E59
#9C8E59
oklch(64.7% 0.074 95.1)
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 #818BBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.035
- Faded Blue #658CBB ΔE 0.035
- Blue Grey #758DA3 ΔE 0.045
- Cool Gray #8D99AE ΔE 0.054
- Lavender Gray #7E7F9A ΔE 0.054
- Heather #A484AC ΔE 0.055
- Light Slate Gray #778899 ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.058
Use #818BBC 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.