#403556
Closest named color: Onyx (#343A40). oklch(35.6% 0.058 298.8), rgb(64, 53, 86).
Aa
White text reads best on this color (11.28:1).
About this color
#403556 is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.058 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.051 away. White text reads best on it, at 11.28:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.058) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.86:1 |
| White text | 11.28:1 |
Values
| HEX | #403556 |
| RGB | rgb(64, 53, 86) |
| HSL | hsl(260, 24%, 27%) |
| OKLCH | oklch(35.6% 0.058 298.8) |
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 #403556 | 11.28:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #403556 | 1.86:1 | Fails | Lc 7.9 | Not readable |
| #403556 text on white | 11.28:1 | AAA | Lc 96.0 | Preferred for body text |
| #403556 text on black | 1.86:1 | 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
#EBE8F1
oklch(93.6% 0.012 301.3)
-
Step 200
200
#DBD6E7
oklch(88.5% 0.024 299.3)
-
Step 300
300
#C4BBD9
oklch(80.9% 0.043 299.1)
-
Step 400
400
#A698C6
oklch(70.8% 0.068 298.6)
-
Step 500
500
#907EB8
oklch(63.2% 0.088 298.1)
-
Step 600
600
#7B66A4
oklch(55.6% 0.097 298.8)
-
Step 700
700
#68558C
oklch(49.2% 0.088 299)
-
Step 800
800
#544572
oklch(42.6% 0.075 298.5)
-
Step 900
900 (this color)
#403556
oklch(35.6% 0.058 298.8)
-
Step 950
950
#292236
oklch(26.9% 0.038 300)
#403556 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) | #2D3B57 | 0.034 |
| Deuteranopia (no green cones) | #2F3A55 | 0.031 |
| Tritanopia (no blue cones) | #3C3A41 | 0.045 |
| Achromatopsia (no color) | #3B3B3B | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403556
#403556
oklch(35.6% 0.058 298.8)
- #39401B
#39401B
oklch(35.5% 0.058 118.3)
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 #403556, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.056
- Gunmetal #293241 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.060
- Charcoal #264653 ΔE 0.064
Use #403556 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.