#818BC4
Closest named color: Faded Blue (#658CBB). oklch(65.1% 0.086 276.1), rgb(129, 139, 196).
Aa
Black text reads best on this color (6.42:1).
About this color
#818BC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.086 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.039 away. Black text reads best on it, at 6.42:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.42:1 |
| White text | 3.26:1 |
Values
| HEX | #818BC4 |
| RGB | rgb(129, 139, 196) |
| HSL | hsl(231, 36%, 64%) |
| OKLCH | oklch(65.1% 0.086 276.1) |
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 #818BC4 | 3.26:1 | AA large text | Lc -65.4 | Content text, not long reading |
| Black text on #818BC4 | 6.42:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #818BC4 text on white | 3.26:1 | AA large text | Lc 60.0 | Large or bold text, headings |
| #818BC4 text on black | 6.42:1 | AA | Lc -41.7 | 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
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D5D8E9
oklch(88.5% 0.023 277.9)
-
Step 300
300
#B9BFDC
oklch(80.9% 0.041 276.2)
-
Step 400
400
#959DCB
oklch(70.6% 0.068 276.8)
-
Step 500
500 (this color)
#818BC4
oklch(65.1% 0.086 276.1)
-
Step 600
600
#656EAA
oklch(55.7% 0.094 276.4)
-
Step 700
700
#535C92
oklch(49.1% 0.087 275.5)
-
Step 800
800
#444B76
oklch(42.6% 0.072 275.9)
-
Step 900
900
#393F5F
oklch(37.7% 0.055 275.3)
-
Step 950
950
#222538
oklch(27.1% 0.036 276.8)
#818BC4 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) | #7991C6 | 0.018 |
| Deuteranopia (no green cones) | #758CC3 | 0.016 |
| Tritanopia (no blue cones) | #6E969F | 0.077 |
| Achromatopsia (no color) | #8E8E8E | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818BC4
#818BC4
oklch(65.1% 0.086 276.1)
- #9F8F50
#9F8F50
oklch(65% 0.085 95.5)
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 #818BC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.039
- Silver Lake Blue #778DA9 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.056
- Perrywinkle #8F8CE7 ΔE 0.057
- Heather #A484AC ΔE 0.060
- Cool Gray #8D99AE ΔE 0.061
- Dusty Blue #5A86AD ΔE 0.064
- Lavender Gray #7E7F9A ΔE 0.065
Use #818BC4 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.