#42336D
Closest named color: Dark Slate Blue (#483D8B). oklch(36.8% 0.097 292.9), rgb(66, 51, 109).
Aa
White text reads best on this color (10.90:1).
About this color
#42336D is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.097 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 10.90:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #42336D |
| RGB | rgb(66, 51, 109) |
| HSL | hsl(256, 36%, 31%) |
| OKLCH | oklch(36.8% 0.097 292.9) |
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 #42336D | 10.90:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #42336D | 1.92:1 | Fails | Lc 8.8 | Not readable |
| #42336D text on white | 10.90:1 | AAA | Lc 95.1 | Preferred for body text |
| #42336D text on black | 1.92:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE8F7
oklch(93.7% 0.02 292.1)
-
Step 200
200
#D9D5F2
oklch(88.5% 0.04 291.9)
-
Step 300
300
#C2B8EC
oklch(80.8% 0.073 293.5)
-
Step 400
400
#A392E3
oklch(70.6% 0.117 292.8)
-
Step 500
500
#8E75DA
oklch(63% 0.149 293)
-
Step 600
600
#795CC8
oklch(55.7% 0.161 292.8)
-
Step 700
700
#664BAD
oklch(49.2% 0.15 292.7)
-
Step 800
800
#533E8C
oklch(42.7% 0.124 292.8)
-
Step 900
900 (this color)
#42336D
oklch(36.8% 0.097 292.9)
-
Step 950
950
#282041
oklch(27% 0.06 293.1)
#42336D 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) | #1C3E6F | 0.058 |
| Deuteranopia (no green cones) | #1F3C6C | 0.054 |
| Tritanopia (no blue cones) | #373F4B | 0.079 |
| Achromatopsia (no color) | #3D3D3D | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42336D
#42336D
oklch(36.8% 0.097 292.9)
- #404300
#404300
oklch(36.8% 0.082 112.6)
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 #42336D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.070
- Twilight Blue #0A437A ΔE 0.073
- Marine Blue #01386A ΔE 0.075
- Blueberry #464196 ΔE 0.075
- Dark Grey Blue #29465B ΔE 0.078
- Cobalt #1E488F ΔE 0.083
- Dark Blue Grey #1F3B4D ΔE 0.085
Use #42336D 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.