#51479B
Closest named color: Blueberry (#464196). oklch(45.3% 0.132 285.3), rgb(81, 71, 155).
Aa
White text reads best on this color (7.70:1).
About this color
#51479B is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.132 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.026 away. White text reads best on it, at 7.70:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.72:1 |
| White text | 7.70:1 |
Values
| HEX | #51479B |
| RGB | rgb(81, 71, 155) |
| HSL | hsl(247, 37%, 44%) |
| OKLCH | oklch(45.3% 0.132 285.3) |
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 #51479B | 7.70:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #51479B | 2.72:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #51479B text on white | 7.70:1 | AAA | Lc 86.5 | Fine for body text |
| #51479B text on black | 2.72:1 | Fails | Lc -15.5 | 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 800.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D6D6F5
oklch(88.6% 0.042 285.5)
-
Step 300
300
#BBBAF1
oklch(80.9% 0.077 285.4)
-
Step 400
400
#9995EA
oklch(70.7% 0.123 284.9)
-
Step 500
500
#8278E4
oklch(63.2% 0.158 285.1)
-
Step 600
600
#6D5ED1
oklch(55.6% 0.171 285.3)
-
Step 700
700
#5B4DB5
oklch(49.1% 0.158 285.1)
-
Step 800
800 (this color)
#51479B
oklch(45.3% 0.132 285.3)
-
Step 900
900
#3E3775
oklch(37.8% 0.103 285.5)
-
Step 950
950
#242145
oklch(27.1% 0.065 285)
#51479B 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) | #1C559E | 0.066 |
| Deuteranopia (no green cones) | #195099 | 0.066 |
| Tritanopia (no blue cones) | #38596A | 0.111 |
| Achromatopsia (no color) | #535353 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51479B
#51479B
oklch(45.3% 0.132 285.3)
- #5E5800
#5E5800
oklch(45.2% 0.096 105)
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 #51479B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.026
- Dark Slate Blue #483D8B ΔE 0.039
- Twilight #4E518B ΔE 0.040
- Rebecca Purple #663399 ΔE 0.055
- Dusk #4E5481 ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.063
- Dusk Blue #26538D ΔE 0.066
- Cobalt #1E488F ΔE 0.068
Use #51479B 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.