#818CAA
Closest named color: Silver Lake Blue (#778DA9). oklch(64.2% 0.047 269.3), rgb(129, 140, 170).
Aa
Black text reads best on this color (6.26:1).
About this color
#818CAA is a medium-light, muted blue. In OKLCH its lightness is 64%, its chroma 0.047 and its hue 269°. 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 6.26:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.26:1 |
| White text | 3.35:1 |
Values
| HEX | #818CAA |
| RGB | rgb(129, 140, 170) |
| HSL | hsl(224, 19%, 59%) |
| OKLCH | oklch(64.2% 0.047 269.3) |
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 #818CAA | 3.35:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #818CAA | 6.26:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #818CAA text on white | 3.35:1 | AA large text | Lc 61.0 | Content text, not long reading |
| #818CAA text on black | 6.26:1 | AA | Lc -40.7 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E2
oklch(88.6% 0.013 271.3)
-
Step 300
300
#BAC0D0
oklch(80.8% 0.023 269.4)
-
Step 400
400
#97A0B8
oklch(70.7% 0.037 269.2)
-
Step 500
500 (this color)
#818CAA
oklch(64.2% 0.047 269.3)
-
Step 600
600
#677292
oklch(55.5% 0.052 269.9)
-
Step 700
700
#56607C
oklch(49.2% 0.047 269.4)
-
Step 800
800
#464E65
oklch(42.6% 0.04 269.7)
-
Step 900
900
#3B4152
oklch(37.7% 0.03 269.7)
-
Step 950
950
#232630
oklch(27% 0.019 272)
#818CAA 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) | #838EAB | 0.006 |
| Deuteranopia (no green cones) | #808BA9 | 0.003 |
| Tritanopia (no blue cones) | #779296 | 0.042 |
| Achromatopsia (no color) | #8C8C8C | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818CAA
#818CAA
oklch(64.2% 0.047 269.3)
- #988C6C
#988C6C
oklch(64.2% 0.047 89.9)
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 #818CAA, 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 0.021
- Light Slate Gray #778899 ΔE 0.030
- Lavender Gray #7E7F9A ΔE 0.039
- Steel #738595 ΔE 0.040
- Cool Gray #8D99AE ΔE 0.041
- Faded Blue #658CBB ΔE 0.042
- Purpley Grey #947E94 ΔE 0.047
Use #818CAA 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.