#55237A
Closest named color: Indigo (#4B0082). oklch(37.4% 0.143 307.1), rgb(85, 35, 122).
Aa
White text reads best on this color (11.00:1).
About this color
#55237A is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.143 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.053 away. White text reads best on it, at 11.00:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.90:1 |
| White text | 11.00:1 |
Values
| HEX | #55237A |
| RGB | rgb(85, 35, 122) |
| HSL | hsl(274, 55%, 31%) |
| OKLCH | oklch(37.4% 0.143 307.1) |
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 #55237A | 11.00:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #55237A | 1.90:1 | Fails | Lc 9.1 | Not readable |
| #55237A text on white | 11.00:1 | AAA | Lc 94.8 | Preferred for body text |
| #55237A text on black | 1.90:1 | Fails | Lc -7.8 | 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
#F8F3FD
oklch(97.1% 0.014 308.3)
-
Step 100
100
#EFE5FB
oklch(93.6% 0.031 306.2)
-
Step 200
200
#E3CFF8
oklch(88.4% 0.059 307.2)
-
Step 300
300
#D3AEF7
oklch(80.9% 0.108 307.3)
-
Step 400
400
#BD80F3
oklch(70.8% 0.172 307)
-
Step 500
500
#AD59EE
oklch(63.1% 0.219 307.2)
-
Step 600
600
#9936DC
oklch(55.7% 0.238 307.3)
-
Step 700
700
#8225BF
oklch(49% 0.222 307)
-
Step 800
800
#6A239B
oklch(42.8% 0.183 307)
-
Step 900
900 (this color)
#55237A
oklch(37.4% 0.143 307.1)
-
Step 950
950
#321748
oklch(27% 0.09 306.8)
#55237A 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) | #003A7D | 0.116 |
| Deuteranopia (no green cones) | #0B3D78 | 0.114 |
| Tritanopia (no blue cones) | #4F364B | 0.101 |
| Achromatopsia (no color) | #3C3C3C | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55237A
#55237A
oklch(37.4% 0.143 307.1)
- #334900
#334900
oklch(37.3% 0.096 126.7)
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 #55237A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.053
- Royal Purple #4B006E ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.066
- Rebecca Purple #663399 ΔE 0.069
- Grape Purple #5D1451 ΔE 0.075
- Blueberry #464196 ΔE 0.082
- Plum Purple #4E0550 ΔE 0.086
- Chrysanthemum #560BAD ΔE 0.087
Use #55237A 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.