#51519A
Closest named color: Twilight (#4E518B). oklch(47.2% 0.116 281), rgb(81, 81, 154).
Aa
White text reads best on this color (7.01:1).
About this color
#51519A is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.116 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.025 away. White text reads best on it, at 7.01:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.99:1 |
| White text | 7.01:1 |
Values
| HEX | #51519A |
| RGB | rgb(81, 81, 154) |
| HSL | hsl(240, 31%, 46%) |
| OKLCH | oklch(47.2% 0.116 281) |
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 #51519A | 7.01:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #51519A | 2.99:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #51519A text on white | 7.01:1 | AAA | Lc 84.1 | Fine for body text |
| #51519A text on black | 2.99:1 | Fails | Lc -17.8 | Dividers and decoration only |
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 700.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D5D7EE
oklch(88.5% 0.032 281.8)
-
Step 300
300
#BABDE5
oklch(80.9% 0.056 281.7)
-
Step 400
400
#969AD8
oklch(70.6% 0.09 281)
-
Step 500
500
#7E80CD
oklch(63.1% 0.115 281.4)
-
Step 600
600
#6768BA
oklch(55.5% 0.125 281)
-
Step 700
700 (this color)
#51519A
oklch(47.2% 0.116 281)
-
Step 800
800
#464782
oklch(42.6% 0.096 280.8)
-
Step 900
900
#3B3C68
oklch(37.7% 0.074 281.2)
-
Step 950
950
#22233D
oklch(26.9% 0.048 281)
#51519A 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) | #335C9D | 0.044 |
| Deuteranopia (no green cones) | #2E5698 | 0.044 |
| Tritanopia (no blue cones) | #38606E | 0.099 |
| Achromatopsia (no color) | #595959 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51519A
#51519A
oklch(47.2% 0.116 281)
- #675C00
#675C00
oklch(47.1% 0.098 101.3)
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 #51519A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.043
- Dusk #4E5481 ΔE 0.044
- Blueberry #464196 ΔE 0.047
- Dusk Blue #26538D ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.059
- Light Navy Blue #2E5A88 ΔE 0.060
Use #51519A 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.