#51319A
Closest named color: Dark Slate Blue (#483D8B). oklch(41.5% 0.162 291.8), rgb(81, 49, 154).
Aa
White text reads best on this color (9.30:1).
About this color
#51319A is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.162 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.039 away. White text reads best on it, at 9.30:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.162) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.25:1 |
| White text | 9.30:1 |
Values
| HEX | #51319A |
| RGB | rgb(81, 49, 154) |
| HSL | hsl(258, 52%, 40%) |
| OKLCH | oklch(41.5% 0.162 291.8) |
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 #51319A | 9.30:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #51319A | 2.25:1 | Fails | Lc 13.0 | Not readable |
| #51319A text on white | 9.30:1 | AAA | Lc 90.9 | Preferred for body text |
| #51319A text on black | 2.25:1 | Fails | Lc -11.4 | 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 800.
-
Step 50
50
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#EAE7FB
oklch(93.6% 0.027 292.8)
-
Step 200
200
#D9D4FA
oklch(88.6% 0.052 291.3)
-
Step 300
300
#C1B6F9
oklch(80.9% 0.094 291.7)
-
Step 400
400
#A38DF6
oklch(70.7% 0.151 291.7)
-
Step 500
500
#8F6CF2
oklch(63.1% 0.193 292)
-
Step 600
600
#7B4FE1
oklch(55.6% 0.21 292)
-
Step 700
700
#683EC3
oklch(49% 0.195 292.1)
-
Step 800
800 (this color)
#51319A
oklch(41.5% 0.162 291.8)
-
Step 900
900
#45307D
oklch(37.7% 0.125 291.9)
-
Step 950
950
#281D49
oklch(27% 0.079 291.8)
#51319A 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) | #00489D | 0.093 |
| Deuteranopia (no green cones) | #004598 | 0.092 |
| Tritanopia (no blue cones) | #3B4B61 | 0.130 |
| Achromatopsia (no color) | #474747 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51319A
#51319A
oklch(41.5% 0.162 291.8)
- #4D5000
#4D5000
oklch(41.5% 0.092 112.2)
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 #51319A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.039
- Blueberry #464196 ΔE 0.040
- Rebecca Purple #663399 ΔE 0.041
- Chrysanthemum #560BAD ΔE 0.055
- Imperial Purple #480CA8 ΔE 0.059
- Indigo Blue #3A18B1 ΔE 0.072
- Blue With A Hint Of Purple #533CC6 ΔE 0.075
- Sapphire #2138AB ΔE 0.076
Use #51319A 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.