#403659
Closest named color: Prussian Blue (#1D3557). oklch(35.9% 0.06 296.4), rgb(64, 54, 89).
Aa
White text reads best on this color (11.11:1).
About this color
#403659 is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.060 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.054 away. White text reads best on it, at 11.11:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.060) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.88:1 |
| White text | 11.11:1 |
Values
| HEX | #403659 |
| RGB | rgb(64, 54, 89) |
| HSL | hsl(257, 24%, 28%) |
| OKLCH | oklch(35.9% 0.06 296.4) |
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 #403659 | 11.11:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #403659 | 1.88:1 | Fails | Lc 8.3 | Not readable |
| #403659 text on white | 11.11:1 | AAA | Lc 95.6 | Preferred for body text |
| #403659 text on black | 1.88:1 | Fails | Lc 0.0 | 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
#F6F5F9
oklch(97.2% 0.005 297.7)
-
Step 100
100
#EAE8F2
oklch(93.5% 0.014 295.3)
-
Step 200
200
#DAD6E8
oklch(88.5% 0.025 296.1)
-
Step 300
300
#C3BBDB
oklch(80.9% 0.045 296.8)
-
Step 400
400
#A498C9
oklch(70.7% 0.072 295.7)
-
Step 500
500
#8F7EBB
oklch(63.2% 0.092 296.5)
-
Step 600
600
#7966A7
oklch(55.6% 0.1 296.4)
-
Step 700
700
#66558F
oklch(49.2% 0.092 296.3)
-
Step 800
800
#534574
oklch(42.6% 0.078 296.7)
-
Step 900
900 (this color)
#403659
oklch(35.9% 0.06 296.4)
-
Step 950
950
#282237
oklch(26.9% 0.039 296.8)
#403659 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) | #2D3C5A | 0.033 |
| Deuteranopia (no green cones) | #2E3B58 | 0.032 |
| Tritanopia (no blue cones) | #3B3C43 | 0.049 |
| Achromatopsia (no color) | #3C3C3C | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403659
#403659
oklch(35.9% 0.06 296.4)
- #3B4119
#3B4119
oklch(36% 0.061 116.7)
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 #403659, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.054
- Onyx #343A40 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.057
- Gunmetal #293241 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.061
- Charcoal Grey #3C4142 ΔE 0.061
- Charcoal #264653 ΔE 0.063
Use #403659 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.