#818FA4
Closest named color: Silver Lake Blue (#778DA9). oklch(64.6% 0.035 258.4), rgb(129, 143, 164).
Aa
Black text reads best on this color (6.39:1).
About this color
#818FA4 is a medium-light, muted blue. In OKLCH its lightness is 65%, its chroma 0.035 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.017 away. Black text reads best on it, at 6.39:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.39:1 |
| White text | 3.28:1 |
Values
| HEX | #818FA4 |
| RGB | rgb(129, 143, 164) |
| HSL | hsl(216, 16%, 57%) |
| OKLCH | oklch(64.6% 0.035 258.4) |
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 #818FA4 | 3.28:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #818FA4 | 6.39:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #818FA4 text on white | 3.28:1 | AA large text | Lc 60.2 | Content text, not long reading |
| #818FA4 text on black | 6.39:1 | AA | Lc -41.5 | 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
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#BAC1CC
oklch(80.9% 0.017 259.4)
-
Step 400
400
#96A1B2
oklch(70.6% 0.028 259)
-
Step 500
500 (this color)
#818FA4
oklch(64.6% 0.035 258.4)
-
Step 600
600
#66748A
oklch(55.5% 0.038 259.4)
-
Step 700
700
#546275
oklch(49.2% 0.035 256.1)
-
Step 800
800
#455060
oklch(42.8% 0.03 257.7)
-
Step 900
900
#3A424E
oklch(37.7% 0.023 258.4)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#818FA4 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) | #8890A5 | 0.010 |
| Deuteranopia (no green cones) | #848CA4 | 0.009 |
| Tritanopia (no blue cones) | #789396 | 0.030 |
| Achromatopsia (no color) | #8E8E8E | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FA4
#818FA4
oklch(64.6% 0.035 258.4)
- #9A8C76
#9A8C76
oklch(64.6% 0.036 79.1)
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 #818FA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.017
- Blue Grey #758DA3 ΔE 0.018
- Light Slate Gray #778899 ΔE 0.028
- Cool Gray #8D99AE ΔE 0.034
- Steel #738595 ΔE 0.039
- Lavender Gray #7E7F9A ΔE 0.044
- Bluey Grey #89A0B0 ΔE 0.049
- Greyblue #77A1B5 ΔE 0.049
Use #818FA4 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.