#42348B
Closest named color: Dark Slate Blue (#483D8B). oklch(39.3% 0.138 285.4), rgb(66, 52, 139).
Aa
White text reads best on this color (10.02:1).
About this color
#42348B is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.138 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.026 away. White text reads best on it, at 10.02:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.09:1 |
| White text | 10.02:1 |
Values
| HEX | #42348B |
| RGB | rgb(66, 52, 139) |
| HSL | hsl(250, 46%, 37%) |
| OKLCH | oklch(39.3% 0.138 285.4) |
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 #42348B | 10.02:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #42348B | 2.09:1 | Fails | Lc 11.1 | Not readable |
| #42348B text on white | 10.02:1 | AAA | Lc 92.9 | Preferred for body text |
| #42348B text on black | 2.09:1 | Fails | Lc -9.6 | 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E7E7FE
oklch(93.5% 0.031 285.8)
-
Step 200
200
#D5D4FF
oklch(88.5% 0.059 286.2)
-
Step 300
300
#BAB8FF
oklch(81% 0.1 285.2)
-
Step 400
400
#998FFF
oklch(70.7% 0.16 285.6)
-
Step 500
500
#836DFF
oklch(63.1% 0.208 285.7)
-
Step 600
600
#6F4EF1
oklch(55.7% 0.231 285.4)
-
Step 700
700
#5D3DD2
oklch(49.2% 0.215 285.2)
-
Step 800
800
#4C34A9
oklch(42.7% 0.177 285.6)
-
Step 900
900 (this color)
#42348B
oklch(39.3% 0.138 285.4)
-
Step 950
950
#241D4E
oklch(27% 0.087 285.5)
#42348B 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) | #00458E | 0.070 |
| Deuteranopia (no green cones) | #004089 | 0.068 |
| Tritanopia (no blue cones) | #26495A | 0.117 |
| Achromatopsia (no color) | #424242 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42348B
#42348B
oklch(39.3% 0.138 285.4)
- #4C4800
#4C4800
oklch(39.3% 0.084 106)
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 #42348B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.026
- Blueberry #464196 ΔE 0.037
- Cobalt #1E488F ΔE 0.063
- Sapphire #2138AB ΔE 0.069
- Rebecca Purple #663399 ΔE 0.070
- Imperial Purple #480CA8 ΔE 0.072
- Twilight Blue #0A437A ΔE 0.076
- Indigo Blue #3A18B1 ΔE 0.078
Use #42348B 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.