#51529A
Closest named color: Twilight (#4E518B). oklch(47.4% 0.114 280.5), rgb(81, 82, 154).
Aa
White text reads best on this color (6.94:1).
About this color
#51529A is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.114 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 6.94:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.02:1 |
| White text | 6.94:1 |
Values
| HEX | #51529A |
| RGB | rgb(81, 82, 154) |
| HSL | hsl(239, 31%, 46%) |
| OKLCH | oklch(47.4% 0.114 280.5) |
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 #51529A | 6.94:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #51529A | 3.02:1 | AA large text | Lc 20.1 | Dividers and decoration only |
| #51529A text on white | 6.94:1 | AA | Lc 83.9 | Fine for body text |
| #51529A text on black | 3.02:1 | AA large text | Lc -18.1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D5D7EE
oklch(88.5% 0.032 281.8)
-
Step 300
300
#B9BDE4
oklch(80.8% 0.055 280.5)
-
Step 400
400
#969BD7
oklch(70.8% 0.088 280.2)
-
Step 500
500
#7D81CC
oklch(63.1% 0.112 280.3)
-
Step 600
600
#6769B9
oklch(55.6% 0.122 280.6)
-
Step 700
700 (this color)
#51529A
oklch(47.4% 0.114 280.5)
-
Step 800
800
#464781
oklch(42.6% 0.095 280.8)
-
Step 900
900
#3B3C68
oklch(37.7% 0.074 281.2)
-
Step 950
950
#22243D
oklch(27.1% 0.046 279.3)
#51529A 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) | #355C9D | 0.041 |
| Deuteranopia (no green cones) | #305798 | 0.042 |
| Tritanopia (no blue cones) | #38616E | 0.099 |
| Achromatopsia (no color) | #5A5A5A | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51529A
#51529A
oklch(47.4% 0.114 280.5)
- #695C00
#695C00
oklch(47.3% 0.098 99.7)
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 #51529A, 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 0.040
- Dusky Blue #475F94 ΔE 0.041
- Dusk #4E5481 ΔE 0.043
- Blueberry #464196 ΔE 0.050
- Dusk Blue #26538D ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.061
Use #51529A 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.