#818596
Closest named color: Light Slate Gray (#778899). oklch(61.9% 0.026 275.1), rgb(129, 133, 150).
Aa
Black text reads best on this color (5.72:1).
About this color
#818596 is a medium-dark close to neutral grey. In OKLCH its lightness is 62%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Light Slate Gray (#778899), ΔE 0.015 away. Black text reads best on it, at 5.72:1.
| Hue family | Neutrals |
| Lightness | medium-dark (62%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Light Slate Gray (#778899) |
| Black text | 5.72:1 |
| White text | 3.66:1 |
Values
| HEX | #818596 |
| RGB | rgb(129, 133, 150) |
| HSL | hsl(229, 9%, 55%) |
| OKLCH | oklch(61.9% 0.026 275.1) |
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 #818596 | 3.66:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #818596 | 5.72:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #818596 text on white | 3.66:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #818596 text on black | 5.72:1 | AA | Lc -37.4 | 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E9EAEC
oklch(93.7% 0.003 264.5)
-
Step 200
200
#D7D9DE
oklch(88.5% 0.007 268.5)
-
Step 300
300
#BEC0C9
oklch(80.9% 0.013 276.1)
-
Step 400
400
#9DA0AE
oklch(70.8% 0.021 276.2)
-
Step 500
500 (this color)
#818596
oklch(61.9% 0.026 275.1)
-
Step 600
600
#6E7284
oklch(55.5% 0.028 275.5)
-
Step 700
700
#5C6070
oklch(49.1% 0.026 274.3)
-
Step 800
800
#4B4E5B
oklch(42.6% 0.022 275.2)
-
Step 900
900
#3F414B
oklch(37.7% 0.017 276.6)
-
Step 950
950
#25262C
oklch(27% 0.011 278.1)
#818596 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) | #818697 | 0.003 |
| Deuteranopia (no green cones) | #7F8596 | 0.003 |
| Tritanopia (no blue cones) | #7C888A | 0.024 |
| Achromatopsia (no color) | #858585 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818596
#818596
oklch(61.9% 0.026 275.1)
- #8B8675
#8B8675
oklch(62% 0.026 93.5)
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 #818596, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Slate Gray #778899 ΔE 0.015
- Steel #738595 ΔE 0.020
- Lavender Gray #7E7F9A ΔE 0.021
- Blue Grey #758DA3 ΔE 0.027
- Slate Gray #708090 ΔE 0.030
- Silver Lake Blue #778DA9 ΔE 0.032
- Purpley Grey #947E94 ΔE 0.032
- Gray #808080 ΔE 0.032
Use #818596 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.