#51298C
Closest named color: Dark Slate Blue (#483D8B). oklch(39.2% 0.155 297.2), rgb(81, 41, 140).
Aa
White text reads best on this color (10.26:1).
About this color
#51298C is a dark, vivid purple. In OKLCH its lightness is 39%, its chroma 0.155 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.046 away. White text reads best on it, at 10.26:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | vivid (0.155) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.26:1 |
Values
| HEX | #51298C |
| RGB | rgb(81, 41, 140) |
| HSL | hsl(264, 55%, 35%) |
| OKLCH | oklch(39.2% 0.155 297.2) |
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 #51298C | 10.26:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #51298C | 2.04:1 | Fails | Lc 10.7 | Not readable |
| #51298C text on white | 10.26:1 | AAA | Lc 93.2 | Preferred for body text |
| #51298C text on black | 2.04:1 | Fails | Lc -9.3 | 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
#F6F3FF
oklch(97% 0.016 297.5)
-
Step 100
100
#ECE6FE
oklch(93.7% 0.033 297.2)
-
Step 200
200
#DDD1FF
oklch(88.5% 0.064 297)
-
Step 300
300
#C8B2FF
oklch(81% 0.109 297)
-
Step 400
400
#AE85FF
oklch(70.8% 0.175 297.2)
-
Step 500
500
#9C5EFF
oklch(63.1% 0.228 297.1)
-
Step 600
600
#8A35F3
oklch(55.7% 0.258 297.3)
-
Step 700
700
#7523D4
oklch(49.1% 0.241 297)
-
Step 800
800
#5F22AB
oklch(42.7% 0.199 297.1)
-
Step 900
900 (this color)
#51298C
oklch(39.2% 0.155 297.2)
-
Step 950
950
#2D174F
oklch(27% 0.098 297.5)
#51298C 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) | #00418F | 0.101 |
| Deuteranopia (no green cones) | #003F8A | 0.101 |
| Tritanopia (no blue cones) | #424157 | 0.119 |
| Achromatopsia (no color) | #414141 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51298C
#51298C
oklch(39.2% 0.155 297.2)
- #424B00
#424B00
oklch(39.1% 0.09 117.3)
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 #51298C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Rebecca Purple #663399 ΔE 0.052
- Blueberry #464196 ΔE 0.057
- Indigo #4B0082 ΔE 0.060
- Chrysanthemum #560BAD ΔE 0.062
- Imperial Purple #480CA8 ΔE 0.062
- Royal Purple #4B006E ΔE 0.080
- Indigo Blue #3A18B1 ΔE 0.082
Use #51298C 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.