#818FAA
Closest named color: Silver Lake Blue (#778DA9). oklch(64.8% 0.044 263.5), rgb(129, 143, 170).
Aa
Black text reads best on this color (6.44:1).
About this color
#818FAA is a medium-light, muted blue. In OKLCH its lightness is 65%, its chroma 0.044 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.015 away. Black text reads best on it, at 6.44:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.44:1 |
| White text | 3.25:1 |
Values
| HEX | #818FAA |
| RGB | rgb(129, 143, 170) |
| HSL | hsl(220, 19%, 59%) |
| OKLCH | oklch(64.8% 0.044 263.5) |
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 #818FAA | 3.25:1 | AA large text | Lc -65.3 | Content text, not long reading |
| Black text on #818FAA | 6.44:1 | AA | Lc 44.2 | Non-text elements, placeholder text |
| #818FAA text on white | 3.25:1 | AA large text | Lc 59.9 | Large or bold text, headings |
| #818FAA text on black | 6.44:1 | AA | Lc -41.8 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E1
oklch(88.5% 0.012 264.5)
-
Step 300
300
#B9C1CF
oklch(80.9% 0.022 261.8)
-
Step 400
400
#96A1B7
oklch(70.8% 0.035 264.3)
-
Step 500
500 (this color)
#818FAA
oklch(64.8% 0.044 263.5)
-
Step 600
600
#657490
oklch(55.7% 0.047 262.8)
-
Step 700
700
#54617A
oklch(49.1% 0.043 263.3)
-
Step 800
800
#454F63
oklch(42.7% 0.036 264.1)
-
Step 900
900
#3A4251
oklch(37.8% 0.028 263)
-
Step 950
950
#22272F
oklch(27.1% 0.017 259.8)
#818FAA 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) | #8690AB | 0.008 |
| Deuteranopia (no green cones) | #838DA9 | 0.006 |
| Tritanopia (no blue cones) | #769498 | 0.038 |
| Achromatopsia (no color) | #8E8E8E | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FAA
#818FAA
oklch(64.8% 0.044 263.5)
- #9C8D71
#9C8D71
oklch(64.9% 0.044 83)
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 #818FAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.015
- Blue Grey #758DA3 ΔE 0.020
- Light Slate Gray #778899 ΔE 0.033
- Cool Gray #8D99AE ΔE 0.034
- Steel #738595 ΔE 0.044
- Faded Blue #658CBB ΔE 0.045
- Lavender Gray #7E7F9A ΔE 0.046
- Greyblue #77A1B5 ΔE 0.048
Use #818FAA 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.