#646590
Closest named color: Dusky Blue (#475F94). oklch(52.3% 0.067 282.8), rgb(100, 101, 144).
Aa
White text reads best on this color (5.51:1).
About this color
#646590 is a medium-dark, muted purple. In OKLCH its lightness is 52%, its chroma 0.067 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.047 away. White text reads best on it, at 5.51:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.80:1 |
| White text | 5.51:1 |
Values
| HEX | #646590 |
| RGB | rgb(100, 101, 144) |
| HSL | hsl(239, 18%, 48%) |
| OKLCH | oklch(52.3% 0.067 282.8) |
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 #646590 | 5.51:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #646590 | 3.80:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #646590 text on white | 5.51:1 | AA | Lc 77.5 | Fine for body text |
| #646590 text on black | 3.80:1 | AA large text | Lc -24.2 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9F0
oklch(93.6% 0.009 286.2)
-
Step 200
200
#D7D8E5
oklch(88.5% 0.018 282.5)
-
Step 300
300
#BDBED6
oklch(80.8% 0.034 283.7)
-
Step 400
400
#9B9DC1
oklch(70.7% 0.052 282.5)
-
Step 500
500
#8385B1
oklch(63.1% 0.066 282.3)
-
Step 600
600
#6D6E9D
oklch(55.6% 0.073 282.8)
-
Step 700
700 (this color)
#646590
oklch(52.3% 0.067 282.8)
-
Step 800
800
#4A4B6D
oklch(42.7% 0.056 282.4)
-
Step 900
900
#3E3F58
oklch(37.8% 0.043 282.4)
-
Step 950
950
#242534
oklch(27% 0.028 281.4)
#646590 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) | #596A92 | 0.019 |
| Deuteranopia (no green cones) | #57678F | 0.019 |
| Tritanopia (no blue cones) | #596D74 | 0.060 |
| Achromatopsia (no color) | #696969 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646590
#646590
oklch(52.3% 0.067 282.8)
- #716C3C
#716C3C
oklch(52.4% 0.068 103.2)
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 #646590, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.047
- Metallic Blue #4F738E ΔE 0.048
- Dusty Purple #825F87 ΔE 0.050
- Muted Purple #805B87 ΔE 0.050
- Dull Blue #49759C ΔE 0.052
- Denim #3B638C ΔE 0.055
- Dark Lavender #856798 ΔE 0.055
- Grey Purple #826D8C ΔE 0.056
Use #646590 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.