#403387
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.135 285.3), rgb(64, 51, 135).
Aa
White text reads best on this color (10.28:1).
About this color
#403387 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.135 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.030 away. White text reads best on it, at 10.28:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.28:1 |
Values
| HEX | #403387 |
| RGB | rgb(64, 51, 135) |
| HSL | hsl(249, 45%, 36%) |
| OKLCH | oklch(38.6% 0.135 285.3) |
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 #403387 | 10.28:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #403387 | 2.04:1 | Fails | Lc 10.4 | Not readable |
| #403387 text on white | 10.28:1 | AAA | Lc 93.5 | Preferred for body text |
| #403387 text on black | 2.04:1 | Fails | Lc -9.0 | 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
#E7E8FD
oklch(93.7% 0.028 283.7)
-
Step 200
200
#D5D5FE
oklch(88.6% 0.056 285.2)
-
Step 300
300
#BAB8FF
oklch(81% 0.1 285.2)
-
Step 400
400
#988FFF
oklch(70.7% 0.16 285.2)
-
Step 500
500
#826EFE
oklch(63.1% 0.206 285.2)
-
Step 600
600
#6E50ED
oklch(55.6% 0.224 285.3)
-
Step 700
700
#5D3FCF
oklch(49.2% 0.209 285.3)
-
Step 800
800
#4B35A7
oklch(42.6% 0.173 285.2)
-
Step 900
900 (this color)
#403387
oklch(38.6% 0.135 285.3)
-
Step 950
950
#241D4D
oklch(26.9% 0.085 285.8)
#403387 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) | #00438A | 0.068 |
| Deuteranopia (no green cones) | #003E85 | 0.066 |
| Tritanopia (no blue cones) | #254758 | 0.113 |
| Achromatopsia (no color) | #414141 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403387
#403387
oklch(38.6% 0.135 285.3)
- #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 #403387, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.030
- Blueberry #464196 ΔE 0.044
- Cobalt #1E488F ΔE 0.064
- Sapphire #2138AB ΔE 0.072
- Twilight Blue #0A437A ΔE 0.073
- Imperial Purple #480CA8 ΔE 0.076
- Rebecca Purple #663399 ΔE 0.076
- Indigo #4B0082 ΔE 0.078
Use #403387 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.