#636099
Closest named color: Dusky Blue (#475F94). oklch(51.7% 0.089 285.2), rgb(99, 96, 153).
Aa
White text reads best on this color (5.73:1).
About this color
#636099 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 52%, its chroma 0.089 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.041 away. White text reads best on it, at 5.73:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.66:1 |
| White text | 5.73:1 |
Values
| HEX | #636099 |
| RGB | rgb(99, 96, 153) |
| HSL | hsl(243, 23%, 49%) |
| OKLCH | oklch(51.7% 0.089 285.2) |
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 #636099 | 5.73:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #636099 | 3.66:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #636099 text on white | 5.73:1 | AA | Lc 78.6 | Fine for body text |
| #636099 text on black | 3.66:1 | AA large text | Lc -23.2 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F2
oklch(93.7% 0.012 286.2)
-
Step 200
200
#D7D7E9
oklch(88.5% 0.025 285.9)
-
Step 300
300
#BDBDDC
oklch(80.8% 0.043 285.4)
-
Step 400
400
#9C9BCA
oklch(70.7% 0.068 285.5)
-
Step 500
500
#8482BD
oklch(63.2% 0.088 285.1)
-
Step 600
600
#6E6BA9
oklch(55.7% 0.095 285.1)
-
Step 700
700 (this color)
#636099
oklch(51.7% 0.089 285.2)
-
Step 800
800
#4B4976
oklch(42.8% 0.074 284.9)
-
Step 900
900
#3E3D5F
oklch(37.7% 0.058 284.6)
-
Step 950
950
#252438
oklch(27.1% 0.037 286)
#636099 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) | #4E689B | 0.034 |
| Deuteranopia (no green cones) | #4D6498 | 0.032 |
| Tritanopia (no blue cones) | #556B75 | 0.077 |
| Achromatopsia (no color) | #666666 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #636099
#636099
oklch(51.7% 0.089 285.2)
- #6F6B27
#6F6B27
oklch(51.7% 0.089 105.9)
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 #636099, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.041
- French Blue #436BAD ΔE 0.052
- Muted Purple #805B87 ΔE 0.054
- Dusty Purple #825F87 ΔE 0.057
- Twilight #4E518B ΔE 0.058
- Denim #3B638C ΔE 0.059
- Dusk #4E5481 ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.059
Use #636099 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.