#403680
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.12 285.4), rgb(64, 54, 128).
Aa
White text reads best on this color (10.20:1).
About this color
#403680 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.120 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 10.20:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.05:1 |
| White text | 10.20:1 |
Values
| HEX | #403680 |
| RGB | rgb(64, 54, 128) |
| HSL | hsl(248, 41%, 36%) |
| OKLCH | oklch(38.6% 0.12 285.4) |
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 #403680 | 10.20:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #403680 | 2.05:1 | Fails | Lc 10.5 | Not readable |
| #403680 text on white | 10.20:1 | AAA | Lc 93.4 | Preferred for body text |
| #403680 text on black | 2.05:1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D5D5FA
oklch(88.5% 0.051 285.3)
-
Step 300
300
#BAB9F9
oklch(80.9% 0.09 284.9)
-
Step 400
400
#9992F6
oklch(70.8% 0.144 285.3)
-
Step 500
500
#8273F2
oklch(63.2% 0.184 285.2)
-
Step 600
600
#6E57E1
oklch(55.7% 0.201 285.5)
-
Step 700
700
#5C46C3
oklch(49.1% 0.186 285.3)
-
Step 800
800
#4B3A9E
oklch(42.7% 0.155 285.5)
-
Step 900
900 (this color)
#403680
oklch(38.6% 0.12 285.4)
-
Step 950
950
#241F49
oklch(27% 0.075 285.6)
#403680 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) | #084383 | 0.063 |
| Deuteranopia (no green cones) | #053F7E | 0.063 |
| Tritanopia (no blue cones) | #2A4755 | 0.102 |
| Achromatopsia (no color) | #414141 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403680
#403680
oklch(38.6% 0.12 285.4)
- #4A4600
#4A4600
oklch(38.6% 0.082 105.9)
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 #403680, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.046
- Cobalt #1E488F ΔE 0.061
- Twilight Blue #0A437A ΔE 0.065
- Twilight #4E518B ΔE 0.079
- Light Navy #155084 ΔE 0.080
- Marine Blue #01386A ΔE 0.080
- Rebecca Purple #663399 ΔE 0.080
Use #403680 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.