#42347E
Closest named color: Dark Slate Blue (#483D8B). oklch(38.2% 0.12 288), rgb(66, 52, 126).
Aa
White text reads best on this color (10.37:1).
About this color
#42347E is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.120 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.033 away. White text reads best on it, at 10.37:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.02:1 |
| White text | 10.37:1 |
Values
| HEX | #42347E |
| RGB | rgb(66, 52, 126) |
| HSL | hsl(251, 42%, 35%) |
| OKLCH | oklch(38.2% 0.12 288) |
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 #42347E | 10.37:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #42347E | 2.02:1 | Fails | Lc 10.1 | Not readable |
| #42347E text on white | 10.37:1 | AAA | Lc 93.8 | Preferred for body text |
| #42347E text on black | 2.02:1 | Fails | Lc -8.7 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D7D5F9
oklch(88.6% 0.049 287.9)
-
Step 300
300
#BDB8F8
oklch(80.9% 0.09 287.8)
-
Step 400
400
#9D90F5
oklch(70.7% 0.145 288)
-
Step 500
500
#8771F0
oklch(63.1% 0.183 287.9)
-
Step 600
600
#7355DF
oklch(55.6% 0.2 288.1)
-
Step 700
700
#6144C2
oklch(49.2% 0.187 288.1)
-
Step 800
800
#4F399D
oklch(42.8% 0.155 288.2)
-
Step 900
900 (this color)
#42347E
oklch(38.2% 0.12 288)
-
Step 950
950
#261E49
oklch(27% 0.077 288.7)
#42347E 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) | #064280 | 0.069 |
| Deuteranopia (no green cones) | #073E7C | 0.067 |
| Tritanopia (no blue cones) | #2F4453 | 0.100 |
| Achromatopsia (no color) | #404040 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42347E
#42347E
oklch(38.2% 0.12 288)
- #474600
#474600
oklch(38.3% 0.083 108.8)
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 #42347E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Blueberry #464196 ΔE 0.051
- Cobalt #1E488F ΔE 0.068
- Twilight Blue #0A437A ΔE 0.070
- Rebecca Purple #663399 ΔE 0.080
- Indigo #4B0082 ΔE 0.081
- Marine Blue #01386A ΔE 0.082
- Twilight #4E518B ΔE 0.083
Use #42347E 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.