#403669
Closest named color: Dark Slate Blue (#483D8B). oklch(36.9% 0.086 290.6), rgb(64, 54, 105).
Aa
White text reads best on this color (10.77:1).
About this color
#403669 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.086 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 0.060 away. White text reads best on it, at 10.77:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.086) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.94:1 |
| White text | 10.77:1 |
Values
| HEX | #403669 |
| RGB | rgb(64, 54, 105) |
| HSL | hsl(252, 32%, 31%) |
| OKLCH | oklch(36.9% 0.086 290.6) |
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 #403669 | 10.77:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #403669 | 1.94:1 | Fails | Lc 9.1 | Not readable |
| #403669 text on white | 10.77:1 | AAA | Lc 94.8 | Preferred for body text |
| #403669 text on black | 1.94:1 | Fails | Lc -7.8 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D8D6F0
oklch(88.6% 0.036 289.2)
-
Step 300
300
#C0BAE8
oklch(80.9% 0.065 290.9)
-
Step 400
400
#A095DC
oklch(70.6% 0.103 290.6)
-
Step 500
500
#8A7AD2
oklch(63.2% 0.13 290.5)
-
Step 600
600
#7561C0
oklch(55.7% 0.143 290.7)
-
Step 700
700
#6250A5
oklch(49.1% 0.132 290.5)
-
Step 800
800
#504286
oklch(42.8% 0.109 290.5)
-
Step 900
900 (this color)
#403669
oklch(36.9% 0.086 290.6)
-
Step 950
950
#27213F
oklch(27% 0.055 291.5)
#403669 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) | #243E6B | 0.044 |
| Deuteranopia (no green cones) | #253C68 | 0.042 |
| Tritanopia (no blue cones) | #36404A | 0.071 |
| Achromatopsia (no color) | #3E3E3E | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403669
#403669
oklch(36.9% 0.086 290.6)
- #424300
#424300
oklch(37% 0.081 110.7)
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 #403669, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.066
- Twilight Blue #0A437A ΔE 0.068
- Marine Blue #01386A ΔE 0.070
- Dark Blue Grey #1F3B4D ΔE 0.074
- Charcoal #264653 ΔE 0.078
- Blueberry #464196 ΔE 0.079
Use #403669 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.