#818CAB
Closest named color: Silver Lake Blue (#778DA9). oklch(64.2% 0.048 269.7), rgb(129, 140, 171).
Aa
Black text reads best on this color (6.27:1).
About this color
#818CAB is a medium-light, muted blue. In OKLCH its lightness is 64%, its chroma 0.048 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.014 away. Black text reads best on it, at 6.27:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.27:1 |
| White text | 3.34:1 |
Values
| HEX | #818CAB |
| RGB | rgb(129, 140, 171) |
| HSL | hsl(224, 20%, 59%) |
| OKLCH | oklch(64.2% 0.048 269.7) |
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 #818CAB | 3.34:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #818CAB | 6.27:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #818CAB text on white | 3.34:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #818CAB 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
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D5D9E2
oklch(88.5% 0.013 266.7)
-
Step 300
300
#BAC0D0
oklch(80.8% 0.023 269.4)
-
Step 400
400
#97A0B9
oklch(70.7% 0.038 269.7)
-
Step 500
500 (this color)
#818CAB
oklch(64.2% 0.048 269.7)
-
Step 600
600
#677293
oklch(55.6% 0.053 270.3)
-
Step 700
700
#56607D
oklch(49.2% 0.048 269.8)
-
Step 800
800
#464E66
oklch(42.7% 0.041 270.3)
-
Step 900
900
#3B4153
oklch(37.7% 0.032 270.4)
-
Step 950
950
#222630
oklch(26.9% 0.02 267.9)
#818CAB 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) | #838EAC | 0.006 |
| Deuteranopia (no green cones) | #7F8BAA | 0.004 |
| Tritanopia (no blue cones) | #769296 | 0.044 |
| Achromatopsia (no color) | #8C8C8C | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818CAB
#818CAB
oklch(64.2% 0.048 269.7)
- #988C6B
#988C6B
oklch(64.2% 0.049 90.4)
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 #818CAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.014
- Blue Grey #758DA3 ΔE 0.022
- Light Slate Gray #778899 ΔE 0.032
- Lavender Gray #7E7F9A ΔE 0.039
- Cool Gray #8D99AE ΔE 0.041
- Faded Blue #658CBB ΔE 0.041
- Steel #738595 ΔE 0.041
- Purpley Grey #947E94 ΔE 0.048
Use #818CAB 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.