#636778
Closest named color: Dim Gray (#696969). oklch(51.6% 0.027 275), rgb(99, 103, 120).
Aa
White text reads best on this color (5.61:1).
About this color
#636778 is a medium-dark close to neutral grey. In OKLCH its lightness is 52%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.028 away. White text reads best on it, at 5.61:1.
| Hue family | Neutrals |
| Lightness | medium-dark (52%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.74:1 |
| White text | 5.61:1 |
Values
| HEX | #636778 |
| RGB | rgb(99, 103, 120) |
| HSL | hsl(229, 10%, 43%) |
| OKLCH | oklch(51.6% 0.027 275) |
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 #636778 | 5.61:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #636778 | 3.74:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #636778 text on white | 5.61:1 | AA | Lc 78.1 | Fine for body text |
| #636778 text on black | 3.74:1 | AA large text | Lc -23.7 | Dividers and decoration only |
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 700.
-
Step 50
50
#F5F5F7
oklch(97.1% 0.003 286.4)
-
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
#9CA0AE
oklch(70.7% 0.021 273.1)
-
Step 500
500
#84899A
oklch(63.2% 0.026 272.6)
-
Step 600
600
#6E7285
oklch(55.5% 0.03 276)
-
Step 700
700 (this color)
#636778
oklch(51.6% 0.027 275)
-
Step 800
800
#4B4E5C
oklch(42.7% 0.023 275.8)
-
Step 900
900
#3F414B
oklch(37.7% 0.017 276.6)
-
Step 950
950
#25262C
oklch(27% 0.011 278.1)
#636778 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) | #626879 | 0.003 |
| Deuteranopia (no green cones) | #616778 | 0.003 |
| Tritanopia (no blue cones) | #5E6A6D | 0.024 |
| Achromatopsia (no color) | #686868 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #636778
#636778
oklch(51.6% 0.027 275)
- #6D6856
#6D6856
oklch(51.7% 0.028 94.3)
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 #636778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.028
- Slate #516572 ΔE 0.029
- Battleship Gray #6C757D ΔE 0.044
- Metallic Blue #4F738E ΔE 0.045
- Dusty Grape #545775 ΔE 0.055
- Grey Purple #826D8C ΔE 0.061
- Dusty Purple #825F87 ΔE 0.062
- Battleship Grey #6B7C85 ΔE 0.062
Use #636778 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.