#403656
Closest named color: Onyx (#343A40). oklch(35.8% 0.056 297.9), rgb(64, 54, 86).
Aa
White text reads best on this color (11.16:1).
About this color
#403656 is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.056 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.050 away. White text reads best on it, at 11.16:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.056) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Values
| HEX | #403656 |
| RGB | rgb(64, 54, 86) |
| HSL | hsl(259, 23%, 27%) |
| OKLCH | oklch(35.8% 0.056 297.9) |
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 #403656 | 11.16:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #403656 | 1.88:1 | Fails | Lc 8.1 | Not readable |
| #403656 text on white | 11.16:1 | AAA | Lc 95.8 | Preferred for body text |
| #403656 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
#EAE8F1
oklch(93.5% 0.012 296.3)
-
Step 200
200
#DBD6E7
oklch(88.5% 0.024 299.3)
-
Step 300
300
#C3BBD9
oklch(80.8% 0.043 297.6)
-
Step 400
400
#A598C5
oklch(70.7% 0.066 297.9)
-
Step 500
500
#8F7EB7
oklch(63% 0.086 297.6)
-
Step 600
600
#7A67A3
oklch(55.6% 0.093 297.9)
-
Step 700
700
#67558B
oklch(49% 0.087 298.5)
-
Step 800
800
#544671
oklch(42.7% 0.071 298.3)
-
Step 900
900 (this color)
#403656
oklch(35.8% 0.056 297.9)
-
Step 950
950
#282336
oklch(27.1% 0.035 296)
#403656 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) | #2E3B57 | 0.031 |
| Deuteranopia (no green cones) | #303B55 | 0.029 |
| Tritanopia (no blue cones) | #3C3B42 | 0.044 |
| Achromatopsia (no color) | #3B3B3B | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403656
#403656
oklch(35.8% 0.056 297.9)
- #3A401D
#3A401D
oklch(35.7% 0.055 117.3)
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 #403656, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.050
- Prussian Blue #1D3557 ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.055
- Gunmetal #293241 ΔE 0.056
- Charcoal Grey #3C4142 ΔE 0.057
- Space Cadet #2B2D42 ΔE 0.058
- Charcoal #264653 ΔE 0.062
Use #403656 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.