#51477E
Closest named color: Twilight (#4E518B). oklch(43.4% 0.089 290.5), rgb(81, 71, 126).
Aa
White text reads best on this color (8.22:1).
About this color
#51477E is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.089 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.031 away. White text reads best on it, at 8.22:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.089) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #51477E |
| RGB | rgb(81, 71, 126) |
| HSL | hsl(251, 28%, 39%) |
| OKLCH | oklch(43.4% 0.089 290.5) |
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 #51477E | 8.22:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #51477E | 2.55:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #51477E text on white | 8.22:1 | AAA | Lc 88.3 | Fine for body text |
| #51477E text on black | 2.55:1 | Fails | Lc -13.8 | 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
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D8D6EB
oklch(88.4% 0.029 290.2)
-
Step 300
300
#C0BBE1
oklch(80.9% 0.053 291.2)
-
Step 400
400
#A098D1
oklch(70.7% 0.083 290.6)
-
Step 500
500
#897DC5
oklch(63% 0.107 290.6)
-
Step 600
600
#7466B2
oklch(55.7% 0.116 290.6)
-
Step 700
700
#615499
oklch(49.1% 0.108 290.5)
-
Step 800
800 (this color)
#51477E
oklch(43.4% 0.089 290.5)
-
Step 900
900
#423A64
oklch(37.7% 0.071 291.4)
-
Step 950
950
#26223A
oklch(26.8% 0.044 290.8)
#51477E 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) | #355080 | 0.045 |
| Deuteranopia (no green cones) | #364E7D | 0.042 |
| Tritanopia (no blue cones) | #46515C | 0.074 |
| Achromatopsia (no color) | #4F4F4F | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51477E
#51477E
oklch(43.4% 0.089 290.5)
- #54550C
#54550C
oklch(43.5% 0.089 110.4)
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 #51477E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.031
- Dusk #4E5481 ΔE 0.036
- Dark Slate Blue #483D8B ΔE 0.041
- Blueberry #464196 ΔE 0.049
- Dusty Grape #545775 ΔE 0.053
- Dusk Blue #26538D ΔE 0.062
- YInMn Blue #415A77 ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.063
Use #51477E 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.