#42417C
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.097 281.9), rgb(66, 65, 124).
Aa
White text reads best on this color (9.21:1).
About this color
#42417C is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.097 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.030 away. White text reads best on it, at 9.21:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.27:1 |
| White text | 9.21:1 |
Values
| HEX | #42417C |
| RGB | rgb(66, 65, 124) |
| HSL | hsl(241, 31%, 37%) |
| OKLCH | oklch(40.7% 0.097 281.9) |
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 #42417C | 9.21:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #42417C | 2.27:1 | Fails | Lc 12.9 | Not readable |
| #42417C text on white | 9.21:1 | AAA | Lc 91.1 | Preferred for body text |
| #42417C text on black | 2.27:1 | Fails | Lc -11.2 | 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 800.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D5D7EE
oklch(88.5% 0.032 281.8)
-
Step 300
300
#BABDE5
oklch(80.9% 0.056 281.7)
-
Step 400
400
#979AD8
oklch(70.7% 0.09 281.7)
-
Step 500
500
#7F80CE
oklch(63.2% 0.116 282)
-
Step 600
600
#6968BA
oklch(55.6% 0.125 282.1)
-
Step 700
700
#5756A1
oklch(49.1% 0.118 281.8)
-
Step 800
800 (this color)
#42417C
oklch(40.7% 0.097 281.9)
-
Step 900
900
#3C3C68
oklch(37.8% 0.074 282.3)
-
Step 950
950
#23233D
oklch(27% 0.048 282.7)
#42417C 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) | #294A7E | 0.038 |
| Deuteranopia (no green cones) | #26457B | 0.038 |
| Tritanopia (no blue cones) | #2F4D58 | 0.084 |
| Achromatopsia (no color) | #484848 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42417C
#42417C
oklch(40.7% 0.097 281.9)
- #534A00
#534A00
oklch(40.5% 0.085 101.4)
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 #42417C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.030
- Blueberry #464196 ΔE 0.044
- Cobalt #1E488F ΔE 0.052
- Twilight #4E518B ΔE 0.053
- Light Navy #155084 ΔE 0.059
- Dusk Blue #26538D ΔE 0.059
- Twilight Blue #0A437A ΔE 0.059
- Dusk #4E5481 ΔE 0.059
Use #42417C 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.