#818BB3
Closest named color: Silver Lake Blue (#778DA9). oklch(64.3% 0.061 273.7), rgb(129, 139, 179).
Aa
Black text reads best on this color (6.27:1).
About this color
#818BB3 is a medium-light, muted blue. In OKLCH its lightness is 64%, its chroma 0.061 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.023 away. Black text reads best on it, at 6.27:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.27:1 |
| White text | 3.34:1 |
Values
| HEX | #818BB3 |
| RGB | rgb(129, 139, 179) |
| HSL | hsl(228, 25%, 60%) |
| OKLCH | oklch(64.3% 0.061 273.7) |
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 #818BB3 | 3.34:1 | AA large text | Lc -66.3 | Content text, not long reading |
| Black text on #818BB3 | 6.27:1 | AA | Lc 43.2 | Non-text elements, placeholder text |
| #818BB3 text on white | 3.34:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #818BB3 text on black | 6.27:1 | AA | Lc -40.8 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D5D9E4
oklch(88.5% 0.016 270)
-
Step 300
300
#BAC0D5
oklch(81% 0.03 273)
-
Step 400
400
#979FBF
oklch(70.7% 0.048 274.1)
-
Step 500
500 (this color)
#818BB3
oklch(64.3% 0.061 273.7)
-
Step 600
600
#67719B
oklch(55.7% 0.066 273.7)
-
Step 700
700
#555E84
oklch(49% 0.062 273.7)
-
Step 800
800
#464D6B
oklch(42.7% 0.051 273.9)
-
Step 900
900
#3B4057
oklch(37.7% 0.04 274.8)
-
Step 950
950
#222633
oklch(27.1% 0.025 271.4)
#818BB3 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) | #7F8FB5 | 0.011 |
| Deuteranopia (no green cones) | #7C8BB2 | 0.007 |
| Tritanopia (no blue cones) | #749399 | 0.055 |
| Achromatopsia (no color) | #8C8C8C | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818BB3
#818BB3
oklch(64.3% 0.061 273.7)
- #998D62
#998D62
oklch(64.3% 0.061 94.4)
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 #818BB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.023
- Blue Grey #758DA3 ΔE 0.032
- Faded Blue #658CBB ΔE 0.036
- Light Slate Gray #778899 ΔE 0.042
- Lavender Gray #7E7F9A ΔE 0.044
- Cool Gray #8D99AE ΔE 0.047
- Steel #738595 ΔE 0.051
- Heather #A484AC ΔE 0.053
Use #818BB3 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.