#51297D
Closest named color: Dark Slate Blue (#483D8B). oklch(38% 0.137 302.1), rgb(81, 41, 125).
Aa
White text reads best on this color (10.69:1).
About this color
#51297D is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.137 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.052 away. White text reads best on it, at 10.69:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.137) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.96:1 |
| White text | 10.69:1 |
Values
| HEX | #51297D |
| RGB | rgb(81, 41, 125) |
| HSL | hsl(269, 51%, 33%) |
| OKLCH | oklch(38% 0.137 302.1) |
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 #51297D | 10.69:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #51297D | 1.96:1 | Fails | Lc 9.6 | Not readable |
| #51297D text on white | 10.69:1 | AAA | Lc 94.3 | Preferred for body text |
| #51297D text on black | 1.96:1 | Fails | Lc -8.3 | 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
#F7F3FD
oklch(97% 0.014 304.1)
-
Step 100
100
#EDE6FB
oklch(93.7% 0.029 301)
-
Step 200
200
#E0D1F9
oklch(88.5% 0.057 302.3)
-
Step 300
300
#CDB1F8
oklch(80.9% 0.102 302.2)
-
Step 400
400
#B484F4
oklch(70.6% 0.164 302.2)
-
Step 500
500
#A360F0
oklch(63.1% 0.209 302.2)
-
Step 600
600
#8F40DF
oklch(55.7% 0.228 302.1)
-
Step 700
700
#7A2FC1
oklch(49.1% 0.212 302.4)
-
Step 800
800
#632A9C
oklch(42.8% 0.175 302.3)
-
Step 900
900 (this color)
#51297D
oklch(38% 0.137 302.1)
-
Step 950
950
#2F1949
oklch(27.1% 0.087 302.1)
#51297D 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) | #003D80 | 0.104 |
| Deuteranopia (no green cones) | #083E7B | 0.102 |
| Tritanopia (no blue cones) | #483C4F | 0.102 |
| Achromatopsia (no color) | #3E3E3E | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51297D
#51297D
oklch(38% 0.137 302.1)
- #3A4900
#3A4900
oklch(37.9% 0.092 122)
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 #51297D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.052
- Indigo #4B0082 ΔE 0.059
- Rebecca Purple #663399 ΔE 0.065
- Royal Purple #4B006E ΔE 0.068
- Blueberry #464196 ΔE 0.069
- Imperial Purple #480CA8 ΔE 0.083
- Chrysanthemum #560BAD ΔE 0.085
- Grape Purple #5D1451 ΔE 0.085
Use #51297D 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.