#55297D
Closest named color: Dark Slate Blue (#483D8B). oklch(38.4% 0.138 304.8), rgb(85, 41, 125).
Aa
White text reads best on this color (10.50:1).
About this color
#55297D is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.138 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.054 away. White text reads best on it, at 10.50:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.99:1 |
| White text | 10.50:1 |
Values
| HEX | #55297D |
| RGB | rgb(85, 41, 125) |
| HSL | hsl(271, 51%, 33%) |
| OKLCH | oklch(38.4% 0.138 304.8) |
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 #55297D | 10.50:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #55297D | 1.99:1 | Fails | Lc 10.1 | Not readable |
| #55297D text on white | 10.50:1 | AAA | Lc 93.8 | Preferred for body text |
| #55297D text on black | 1.99:1 | 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
#F7F3FD
oklch(97% 0.014 304.1)
-
Step 100
100
#EEE5FA
oklch(93.5% 0.03 305.1)
-
Step 200
200
#E2D0F8
oklch(88.5% 0.057 305.6)
-
Step 300
300
#D0B0F7
oklch(81% 0.104 304.8)
-
Step 400
400
#B983F2
oklch(70.8% 0.164 305)
-
Step 500
500
#A85DED
oklch(63% 0.211 305.1)
-
Step 600
600
#933DDC
oklch(55.6% 0.229 304.5)
-
Step 700
700
#7E2CBF
oklch(49.1% 0.214 304.8)
-
Step 800
800
#66279A
oklch(42.6% 0.177 304.8)
-
Step 900
900 (this color)
#55297D
oklch(38.4% 0.138 304.8)
-
Step 950
950
#301848
oklch(26.9% 0.087 304.2)
#55297D 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) | #003E80 | 0.111 |
| Deuteranopia (no green cones) | #113F7B | 0.105 |
| Tritanopia (no blue cones) | #4E3B4F | 0.100 |
| Achromatopsia (no color) | #3F3F3F | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55297D
#55297D
oklch(38.4% 0.138 304.8)
- #384C00
#384C00
oklch(38.5% 0.097 125)
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 #55297D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Rebecca Purple #663399 ΔE 0.060
- Indigo #4B0082 ΔE 0.062
- Blueberry #464196 ΔE 0.070
- Royal Purple #4B006E ΔE 0.071
- Grape Purple #5D1451 ΔE 0.083
- Chrysanthemum #560BAD ΔE 0.086
- Imperial Purple #480CA8 ΔE 0.087
Use #55297D 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.