#51508F
Closest named color: Twilight (#4E518B). oklch(46.3% 0.101 282.4), rgb(81, 80, 143).
Aa
White text reads best on this color (7.25:1).
About this color
#51508F is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.101 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.009 away. White text reads best on it, at 7.25:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #51508F |
| RGB | rgb(81, 80, 143) |
| HSL | hsl(241, 28%, 44%) |
| OKLCH | oklch(46.3% 0.101 282.4) |
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 #51508F | 7.25:1 | AAA | Lc -90.0 | Fine for body text |
| Black text on #51508F | 2.89:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #51508F text on white | 7.25:1 | AAA | Lc 85.1 | Fine for body text |
| #51508F text on black | 2.89:1 | Fails | Lc -16.9 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D6D7EB
oklch(88.4% 0.027 283.5)
-
Step 300
300
#BBBDE0
oklch(80.8% 0.049 282.7)
-
Step 400
400
#999BD0
oklch(70.7% 0.077 282.6)
-
Step 500
500
#8081C4
oklch(63% 0.1 282.5)
-
Step 600
600
#6A6AB1
oklch(55.6% 0.109 282.3)
-
Step 700
700 (this color)
#51508F
oklch(46.3% 0.101 282.4)
-
Step 800
800
#48487B
oklch(42.6% 0.084 282.3)
-
Step 900
900
#3C3D63
oklch(37.7% 0.065 281.7)
-
Step 950
950
#23243A
oklch(27% 0.041 281.3)
#51508F 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) | #395991 | 0.038 |
| Deuteranopia (no green cones) | #36558E | 0.037 |
| Tritanopia (no blue cones) | #3E5D68 | 0.088 |
| Achromatopsia (no color) | #575757 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51508F
#51508F
oklch(46.3% 0.101 282.4)
- #645A00
#645A00
oklch(46.3% 0.097 101.9)
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 #51508F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.009
- Dusk #4E5481 ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.039
- Dusky Blue #475F94 ΔE 0.042
- Blueberry #464196 ΔE 0.048
- Dusty Grape #545775 ΔE 0.052
- Light Navy Blue #2E5A88 ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
Use #51508F 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.