#818FA5
Closest named color: Silver Lake Blue (#778DA9). oklch(64.6% 0.037 259.4), rgb(129, 143, 165).
Aa
Black text reads best on this color (6.40:1).
About this color
#818FA5 is a medium-light, muted blue. In OKLCH its lightness is 65%, its chroma 0.037 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.016 away. Black text reads best on it, at 6.40:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.40:1 |
| White text | 3.27:1 |
Values
| HEX | #818FA5 |
| RGB | rgb(129, 143, 165) |
| HSL | hsl(217, 17%, 58%) |
| OKLCH | oklch(64.6% 0.037 259.4) |
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 #818FA5 | 3.27:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #818FA5 | 6.40:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #818FA5 text on white | 3.27:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #818FA5 text on black | 6.40:1 | AA | Lc -41.6 | 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
#BAC1CD
oklch(80.9% 0.019 261.3)
-
Step 400
400
#96A1B3
oklch(70.6% 0.029 260.3)
-
Step 500
500 (this color)
#818FA5
oklch(64.6% 0.037 259.4)
-
Step 600
600
#66748B
oklch(55.6% 0.04 260.3)
-
Step 700
700
#546176
oklch(49% 0.037 259.9)
-
Step 800
800
#455060
oklch(42.8% 0.03 257.7)
-
Step 900
900
#3A424F
oklch(37.7% 0.025 260.1)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#818FA5 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) | #8890A6 | 0.010 |
| Deuteranopia (no green cones) | #848CA5 | 0.009 |
| Tritanopia (no blue cones) | #789496 | 0.033 |
| Achromatopsia (no color) | #8E8E8E | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FA5
#818FA5
oklch(64.6% 0.037 259.4)
- #9A8C75
#9A8C75
oklch(64.6% 0.037 80.2)
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 #818FA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.016
- Blue Grey #758DA3 ΔE 0.018
- Light Slate Gray #778899 ΔE 0.029
- Cool Gray #8D99AE ΔE 0.034
- Steel #738595 ΔE 0.040
- Lavender Gray #7E7F9A ΔE 0.044
- Bluey Grey #89A0B0 ΔE 0.049
- Greyblue #77A1B5 ΔE 0.049
Use #818FA5 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.