#403569
Closest named color: Dark Slate Blue (#483D8B). oklch(36.7% 0.087 291.2), rgb(64, 53, 105).
Aa
White text reads best on this color (10.87:1).
About this color
#403569 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.087 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.061 away. White text reads best on it, at 10.87:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.087) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.93:1 |
| White text | 10.87:1 |
Values
| HEX | #403569 |
| RGB | rgb(64, 53, 105) |
| HSL | hsl(253, 33%, 31%) |
| OKLCH | oklch(36.7% 0.087 291.2) |
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 #403569 | 10.87:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #403569 | 1.93:1 | Fails | Lc 8.9 | Not readable |
| #403569 text on white | 10.87:1 | AAA | Lc 95.1 | Preferred for body text |
| #403569 text on black | 1.93:1 | Fails | Lc -7.6 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D9D5F0
oklch(88.4% 0.037 292.4)
-
Step 300
300
#C0BAE8
oklch(80.9% 0.065 290.9)
-
Step 400
400
#A195DD
oklch(70.8% 0.104 291.1)
-
Step 500
500
#8B79D4
oklch(63.2% 0.134 291.1)
-
Step 600
600
#7660C1
oklch(55.7% 0.146 291.4)
-
Step 700
700
#634FA6
oklch(49.1% 0.135 291.2)
-
Step 800
800
#514187
oklch(42.8% 0.113 291.4)
-
Step 900
900 (this color)
#403569
oklch(36.7% 0.087 291.2)
-
Step 950
950
#27213F
oklch(27% 0.055 291.5)
#403569 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) | #223E6B | 0.047 |
| Deuteranopia (no green cones) | #243C68 | 0.044 |
| Tritanopia (no blue cones) | #363F4A | 0.071 |
| Achromatopsia (no color) | #3D3D3D | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403569
#403569
oklch(36.7% 0.087 291.2)
- #414200
#414200
oklch(36.6% 0.08 110.7)
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 #403569, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.069
- Twilight Blue #0A437A ΔE 0.069
- Marine Blue #01386A ΔE 0.070
- Dark Blue Grey #1F3B4D ΔE 0.075
- Blueberry #464196 ΔE 0.080
- Charcoal #264653 ΔE 0.080
Use #403569 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.