#818FB5
Closest named color: Silver Lake Blue (#778DA9). oklch(65.3% 0.059 269), rgb(129, 143, 181).
Aa
Black text reads best on this color (6.52:1).
About this color
#818FB5 is a medium-light, muted blue. In OKLCH its lightness is 65%, its chroma 0.059 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.023 away. Black text reads best on it, at 6.52:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.52:1 |
| White text | 3.21:1 |
Values
| HEX | #818FB5 |
| RGB | rgb(129, 143, 181) |
| HSL | hsl(224, 26%, 61%) |
| OKLCH | oklch(65.3% 0.059 269) |
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 #818FB5 | 3.21:1 | AA large text | Lc -64.8 | Content text, not long reading |
| Black text on #818FB5 | 6.52:1 | AA | Lc 44.7 | Non-text elements, placeholder text |
| #818FB5 text on white | 3.21:1 | AA large text | Lc 59.4 | Large or bold text, headings |
| #818FB5 text on black | 6.52:1 | AA | Lc -42.3 | 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
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D5D9E4
oklch(88.5% 0.016 270)
-
Step 300
300
#B9C0D4
oklch(80.9% 0.029 270.3)
-
Step 400
400
#95A0BE
oklch(70.7% 0.046 269.4)
-
Step 500
500 (this color)
#818FB5
oklch(65.3% 0.059 269)
-
Step 600
600
#64729A
oklch(55.6% 0.065 269.3)
-
Step 700
700
#535F83
oklch(49% 0.06 269.9)
-
Step 800
800
#444E6B
oklch(42.7% 0.05 269.5)
-
Step 900
900
#394157
oklch(37.7% 0.039 269)
-
Step 950
950
#212633
oklch(27% 0.025 268.3)
#818FB5 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) | #8392B7 | 0.009 |
| Deuteranopia (no green cones) | #7F8DB4 | 0.006 |
| Tritanopia (no blue cones) | #73969C | 0.052 |
| Achromatopsia (no color) | #8F8F8F | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FB5
#818FB5
oklch(65.3% 0.059 269)
- #9F8F66
#9F8F66
oklch(65.4% 0.06 89.2)
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 #818FB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.023
- Blue Grey #758DA3 ΔE 0.033
- Cool Gray #8D99AE ΔE 0.038
- Faded Blue #658CBB ΔE 0.038
- Light Slate Gray #778899 ΔE 0.046
- Greyblue #77A1B5 ΔE 0.051
- Lavender Gray #7E7F9A ΔE 0.052
- Bluey Grey #89A0B0 ΔE 0.053
Use #818FB5 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.