#42367D
Closest named color: Dark Slate Blue (#483D8B). oklch(38.5% 0.116 287.4), rgb(66, 54, 125).
Aa
White text reads best on this color (10.21:1).
About this color
#42367D is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.116 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.031 away. White text reads best on it, at 10.21:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.05:1 |
| White text | 10.21:1 |
Values
| HEX | #42367D |
| RGB | rgb(66, 54, 125) |
| HSL | hsl(250, 40%, 35%) |
| OKLCH | oklch(38.5% 0.116 287.4) |
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 #42367D | 10.21:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #42367D | 2.05:1 | Fails | Lc 10.5 | Not readable |
| #42367D text on white | 10.21:1 | AAA | Lc 93.5 | Preferred for body text |
| #42367D text on black | 2.05:1 | Fails | Lc -9.0 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D6D5F8
oklch(88.5% 0.048 286.7)
-
Step 300
300
#BDB8F6
oklch(80.8% 0.087 288)
-
Step 400
400
#9C91F2
oklch(70.6% 0.139 287.5)
-
Step 500
500
#8673ED
oklch(63.2% 0.177 287.4)
-
Step 600
600
#7157DB
oklch(55.5% 0.193 287.4)
-
Step 700
700
#5F46BE
oklch(49% 0.179 287.4)
-
Step 800
800
#4E3B9A
oklch(42.8% 0.148 287.6)
-
Step 900
900 (this color)
#42367D
oklch(38.5% 0.116 287.4)
-
Step 950
950
#251F48
oklch(27% 0.074 287.1)
#42367D 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) | #10437F | 0.063 |
| Deuteranopia (no green cones) | #103F7B | 0.062 |
| Tritanopia (no blue cones) | #2F4554 | 0.095 |
| Achromatopsia (no color) | #414141 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42367D
#42367D
oklch(38.5% 0.116 287.4)
- #494600
#494600
oklch(38.5% 0.082 106.9)
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 #42367D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.031
- Blueberry #464196 ΔE 0.049
- Cobalt #1E488F ΔE 0.065
- Twilight Blue #0A437A ΔE 0.067
- Twilight #4E518B ΔE 0.079
- Rebecca Purple #663399 ΔE 0.080
- Light Navy #155084 ΔE 0.081
- Marine Blue #01386A ΔE 0.081
Use #42367D 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.