#55316B
Closest named color: Dark Slate Blue (#483D8B). oklch(38.5% 0.102 311.1), rgb(85, 49, 107).
Aa
White text reads best on this color (10.30:1).
About this color
#55316B is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.102 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.062 away. White text reads best on it, at 10.30:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.102) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.03:1 |
| White text | 10.30:1 |
Values
| HEX | #55316B |
| RGB | rgb(85, 49, 107) |
| HSL | hsl(277, 37%, 31%) |
| OKLCH | oklch(38.5% 0.102 311.1) |
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 #55316B | 10.30:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #55316B | 2.03:1 | Fails | Lc 10.3 | Not readable |
| #55316B text on white | 10.30:1 | AAA | Lc 93.7 | Preferred for body text |
| #55316B text on black | 2.03:1 | Fails | Lc -8.9 | 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
#F8F4FB
oklch(97.2% 0.01 311.2)
-
Step 100
100
#EFE6F5
oklch(93.6% 0.022 312.2)
-
Step 200
200
#E2D2EE
oklch(88.5% 0.042 310.9)
-
Step 300
300
#D1B3E6
oklch(80.9% 0.077 311.2)
-
Step 400
400
#B98AD9
oklch(70.7% 0.123 310.8)
-
Step 500
500
#A86ACE
oklch(63.1% 0.157 311.3)
-
Step 600
600
#934FBB
oklch(55.6% 0.171 311.1)
-
Step 700
700
#7D3FA1
oklch(49% 0.159 311.1)
-
Step 800
800
#663583
oklch(42.8% 0.132 311)
-
Step 900
900 (this color)
#55316B
oklch(38.5% 0.102 311.1)
-
Step 950
950
#311C3D
oklch(27% 0.065 312.1)
#55316B 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) | #223F6D | 0.085 |
| Deuteranopia (no green cones) | #2D416A | 0.076 |
| Tritanopia (no blue cones) | #523B49 | 0.072 |
| Achromatopsia (no color) | #404040 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55316B
#55316B
oklch(38.5% 0.102 311.1)
- #2F4E04
#2F4E04
oklch(38.5% 0.103 131.2)
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 #55316B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.062
- Grape Purple #5D1451 ΔE 0.069
- Blueberry #464196 ΔE 0.081
- Rebecca Purple #663399 ΔE 0.082
- Royal Purple #4B006E ΔE 0.088
- Rich Purple #720058 ΔE 0.089
- Velvet #750851 ΔE 0.092
- Indigo #4B0082 ΔE 0.092
Use #55316B 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.