#403863
Closest named color: Dark Grey Blue (#29465B). oklch(37% 0.073 290.9), rgb(64, 56, 99).
Aa
White text reads best on this color (10.69:1).
About this color
#403863 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.073 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.057 away. White text reads best on it, at 10.69:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.073) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.96:1 |
| White text | 10.69:1 |
Values
| HEX | #403863 |
| RGB | rgb(64, 56, 99) |
| HSL | hsl(251, 28%, 30%) |
| OKLCH | oklch(37% 0.073 290.9) |
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 #403863 | 10.69:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #403863 | 1.96:1 | Fails | Lc 9.2 | Not readable |
| #403863 text on white | 10.69:1 | AAA | Lc 94.7 | Preferred for body text |
| #403863 text on black | 1.96:1 | Fails | Lc -7.9 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D9D6EC
oklch(88.5% 0.03 292)
-
Step 300
300
#C0BBE2
oklch(80.9% 0.055 291)
-
Step 400
400
#A097D3
oklch(70.6% 0.087 290.9)
-
Step 500
500
#8A7DC8
oklch(63.2% 0.111 290.8)
-
Step 600
600
#7465B4
oklch(55.6% 0.12 290.7)
-
Step 700
700
#62539B
oklch(49.1% 0.113 291.3)
-
Step 800
800
#50447E
oklch(42.7% 0.094 291.4)
-
Step 900
900 (this color)
#403863
oklch(37% 0.073 290.9)
-
Step 950
950
#27223B
oklch(27% 0.046 292.2)
#403863 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) | #2B3F65 | 0.035 |
| Deuteranopia (no green cones) | #2B3D62 | 0.034 |
| Tritanopia (no blue cones) | #384048 | 0.061 |
| Achromatopsia (no color) | #3E3E3E | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403863
#403863
oklch(37% 0.073 290.9)
- #42430D
#42430D
oklch(37.1% 0.073 110.5)
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 #403863, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.066
- Charcoal #264653 ΔE 0.067
- Onyx #343A40 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.069
- Twilight Blue #0A437A ΔE 0.069
- Marine Blue #01386A ΔE 0.071
Use #403863 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.