#42316D
Closest named color: Dark Slate Blue (#483D8B). oklch(36.4% 0.1 293.9), rgb(66, 49, 109).
Aa
White text reads best on this color (11.10:1).
About this color
#42316D is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.100 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.058 away. White text reads best on it, at 11.10:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.100) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.89:1 |
| White text | 11.10:1 |
Values
| HEX | #42316D |
| RGB | rgb(66, 49, 109) |
| HSL | hsl(257, 38%, 31%) |
| OKLCH | oklch(36.4% 0.1 293.9) |
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 #42316D | 11.10:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #42316D | 1.89:1 | Fails | Lc 8.4 | Not readable |
| #42316D text on white | 11.10:1 | AAA | Lc 95.5 | Preferred for body text |
| #42316D text on black | 1.89:1 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EAE7F7
oklch(93.5% 0.022 294.6)
-
Step 200
200
#DAD4F3
oklch(88.4% 0.043 294.4)
-
Step 300
300
#C3B8ED
oklch(81% 0.075 294.2)
-
Step 400
400
#A591E4
oklch(70.7% 0.12 294.2)
-
Step 500
500
#9074DC
oklch(63.2% 0.153 294)
-
Step 600
600
#7B5ACA
oklch(55.7% 0.167 293.9)
-
Step 700
700
#6849AF
oklch(49.2% 0.156 293.9)
-
Step 800
800
#543C8D
oklch(42.6% 0.129 293.9)
-
Step 900
900 (this color)
#42316D
oklch(36.4% 0.1 293.9)
-
Step 950
950
#281F42
oklch(26.9% 0.064 293.5)
#42316D 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) | #183C6F | 0.062 |
| Deuteranopia (no green cones) | #1C3B6C | 0.058 |
| Tritanopia (no blue cones) | #373D4A | 0.080 |
| Achromatopsia (no color) | #3C3C3C | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42316D
#42316D
oklch(36.4% 0.1 293.9)
- #3E4200
#3E4200
oklch(36.3% 0.081 113.6)
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 #42316D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.071
- Twilight Blue #0A437A ΔE 0.076
- Marine Blue #01386A ΔE 0.076
- Blueberry #464196 ΔE 0.077
- Dark Grey Blue #29465B ΔE 0.082
- Royal Purple #4B006E ΔE 0.084
- Indigo #4B0082 ΔE 0.085
Use #42316D 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.