#403A7F
Closest named color: Dark Slate Blue (#483D8B). oklch(39.3% 0.113 283.9), rgb(64, 58, 127).
Aa
White text reads best on this color (9.86:1).
About this color
#403A7F is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.113 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.025 away. White text reads best on it, at 9.86:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.12:1 |
| White text | 9.86:1 |
Values
| HEX | #403A7F |
| RGB | rgb(64, 58, 127) |
| HSL | hsl(245, 37%, 36%) |
| OKLCH | oklch(39.3% 0.113 283.9) |
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 #403A7F | 9.86:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #403A7F | 2.12:1 | Fails | Lc 11.3 | Not readable |
| #403A7F text on white | 9.86:1 | AAA | Lc 92.7 | Preferred for body text |
| #403A7F text on black | 2.12:1 | Fails | Lc -9.8 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D5D6F8
oklch(88.6% 0.047 284.1)
-
Step 300
300
#B9BAF6
oklch(80.9% 0.084 283.6)
-
Step 400
400
#9794F1
oklch(70.8% 0.134 283.9)
-
Step 500
500
#7F76ED
oklch(63.1% 0.173 283.7)
-
Step 600
600
#6A5BDB
oklch(55.5% 0.188 283.7)
-
Step 700
700
#594ABE
oklch(49.1% 0.175 283.8)
-
Step 800
800
#493E9A
oklch(42.8% 0.144 283.9)
-
Step 900
900 (this color)
#403A7F
oklch(39.3% 0.113 283.9)
-
Step 950
950
#232048
oklch(27% 0.072 283.9)
#403A7F 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) | #184581 | 0.052 |
| Deuteranopia (no green cones) | #14417D | 0.053 |
| Tritanopia (no blue cones) | #2A4956 | 0.097 |
| Achromatopsia (no color) | #434343 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403A7F
#403A7F
oklch(39.3% 0.113 283.9)
- #4D4700
#4D4700
oklch(39.1% 0.083 104.1)
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 #403A7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.025
- Blueberry #464196 ΔE 0.042
- Cobalt #1E488F ΔE 0.055
- Twilight Blue #0A437A ΔE 0.061
- Twilight #4E518B ΔE 0.070
- Light Navy #155084 ΔE 0.071
- Dusk Blue #26538D ΔE 0.072
- Dusk #4E5481 ΔE 0.079
Use #403A7F 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.