#40328B
Closest named color: Dark Slate Blue (#483D8B). oklch(38.7% 0.141 284.9), rgb(64, 50, 139).
Aa
White text reads best on this color (10.25:1).
About this color
#40328B is a dark, vivid purple. In OKLCH its lightness is 39%, its chroma 0.141 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.032 away. White text reads best on it, at 10.25:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #40328B |
| RGB | rgb(64, 50, 139) |
| HSL | hsl(249, 47%, 37%) |
| OKLCH | oklch(38.7% 0.141 284.9) |
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 #40328B | 10.25:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #40328B | 2.04:1 | Fails | Lc 10.5 | Not readable |
| #40328B text on white | 10.25:1 | AAA | Lc 93.4 | Preferred for body text |
| #40328B text on black | 2.04:1 | Fails | Lc -9.1 | Not readable |
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 900.
-
Step 50
50
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E7E8FE
oklch(93.7% 0.03 283.7)
-
Step 200
200
#D4D5FF
oklch(88.6% 0.058 284.1)
-
Step 300
300
#B9B8FF
oklch(80.9% 0.1 284.6)
-
Step 400
400
#988FFF
oklch(70.7% 0.16 285.2)
-
Step 500
500
#816EFF
oklch(63.1% 0.207 284.7)
-
Step 600
600
#6E4CF4
oklch(55.6% 0.236 285)
-
Step 700
700
#5C3BD4
oklch(49% 0.219 284.8)
-
Step 800
800
#4B33AC
oklch(42.8% 0.182 284.8)
-
Step 900
900 (this color)
#40328B
oklch(38.7% 0.141 284.9)
-
Step 950
950
#241D4F
oklch(27.1% 0.088 285.2)
#40328B 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) | #00438E | 0.069 |
| Deuteranopia (no green cones) | #003E89 | 0.066 |
| Tritanopia (no blue cones) | #224759 | 0.118 |
| Achromatopsia (no color) | #414141 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40328B
#40328B
oklch(38.7% 0.141 284.9)
- #4B4600
#4B4600
oklch(38.7% 0.082 105)
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 #40328B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.032
- Blueberry #464196 ΔE 0.042
- Cobalt #1E488F ΔE 0.065
- Sapphire #2138AB ΔE 0.067
- Imperial Purple #480CA8 ΔE 0.069
- Rebecca Purple #663399 ΔE 0.074
- Indigo Blue #3A18B1 ΔE 0.075
- Twilight Blue #0A437A ΔE 0.076
Use #40328B 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.