#42237C
Closest named color: Indigo (#4B0082). oklch(35.2% 0.142 293.8), rgb(66, 35, 124).
Aa
White text reads best on this color (11.91:1).
About this color
#42237C is a dark, vivid purple. In OKLCH its lightness is 35%, its chroma 0.142 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.045 away. White text reads best on it, at 11.91:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.76:1 |
| White text | 11.91:1 |
Values
| HEX | #42237C |
| RGB | rgb(66, 35, 124) |
| HSL | hsl(261, 56%, 31%) |
| OKLCH | oklch(35.2% 0.142 293.8) |
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 #42237C | 11.91:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #42237C | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #42237C text on white | 11.91:1 | AAA | Lc 96.7 | Preferred for body text |
| #42237C text on black | 1.76:1 | 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
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#EAE6FD
oklch(93.5% 0.031 293.8)
-
Step 200
200
#DAD2FD
oklch(88.4% 0.059 293.7)
-
Step 300
300
#C4B3FF
oklch(80.8% 0.107 294.1)
-
Step 400
400
#A888FF
oklch(70.7% 0.17 294)
-
Step 500
500
#9464FD
oklch(63.1% 0.217 293.7)
-
Step 600
600
#8144EC
oklch(55.7% 0.236 293.9)
-
Step 700
700
#6D33CE
oklch(49.1% 0.22 293.6)
-
Step 800
800
#592CA6
oklch(42.7% 0.182 294.1)
-
Step 900
900 (this color)
#42237C
oklch(35.2% 0.142 293.8)
-
Step 950
950
#2A1A4D
oklch(27% 0.09 294)
#42237C 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) | #00387F | 0.085 |
| Deuteranopia (no green cones) | #00357A | 0.084 |
| Tritanopia (no blue cones) | #31394C | 0.112 |
| Achromatopsia (no color) | #373737 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42237C
#42237C
oklch(35.2% 0.142 293.8)
- #3B3F00
#3B3F00
oklch(35.2% 0.079 113.8)
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 #42237C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.045
- Royal Purple #4B006E ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.067
- Imperial Purple #480CA8 ΔE 0.076
- Blueberry #464196 ΔE 0.082
- Midnight Blue #191970 ΔE 0.083
- Chrysanthemum #560BAD ΔE 0.089
- Indigo Blue #3A18B1 ΔE 0.091
Use #42237C 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.