#51497F
Closest named color: Twilight (#4E518B). oklch(43.8% 0.087 289.1), rgb(81, 73, 127).
Aa
White text reads best on this color (8.04:1).
About this color
#51497F is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.087 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.027 away. White text reads best on it, at 8.04:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.60:1 |
| White text | 8.04:1 |
Values
| HEX | #51497F |
| RGB | rgb(81, 73, 127) |
| HSL | hsl(249, 27%, 39%) |
| OKLCH | oklch(43.8% 0.087 289.1) |
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 #51497F | 8.04:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #51497F | 2.60:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #51497F text on white | 8.04:1 | AAA | Lc 87.8 | Fine for body text |
| #51497F text on black | 2.60:1 | Fails | Lc -14.3 | 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 800.
-
Step 50
50
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F3
oklch(93.5% 0.015 290.3)
-
Step 200
200
#D8D6EB
oklch(88.4% 0.029 290.2)
-
Step 300
300
#BFBCE0
oklch(80.9% 0.05 289)
-
Step 400
400
#9F98D1
oklch(70.6% 0.083 289.7)
-
Step 500
500
#887EC5
oklch(63.1% 0.106 289.5)
-
Step 600
600
#7267B1
oklch(55.7% 0.113 289)
-
Step 700
700
#605598
oklch(49.1% 0.105 289.5)
-
Step 800
800 (this color)
#51497F
oklch(43.8% 0.087 289.1)
-
Step 900
900
#413B63
oklch(37.7% 0.067 289.6)
-
Step 950
950
#26233A
oklch(27.1% 0.042 289.2)
#51497F 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) | #385181 | 0.040 |
| Deuteranopia (no green cones) | #384F7E | 0.039 |
| Tritanopia (no blue cones) | #45535E | 0.073 |
| Achromatopsia (no color) | #505050 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51497F
#51497F
oklch(43.8% 0.087 289.1)
- #565610
#565610
oklch(43.9% 0.088 109.5)
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 #51497F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.027
- Dusk #4E5481 ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.045
- Dusty Grape #545775 ΔE 0.049
- Blueberry #464196 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.058
- Dusk Blue #26538D ΔE 0.059
Use #51497F 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.