#51488D
Closest named color: Twilight (#4E518B). oklch(44.5% 0.11 287), rgb(81, 72, 141).
Aa
White text reads best on this color (7.89:1).
About this color
#51488D is a dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.110 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.026 away. White text reads best on it, at 7.89:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.66:1 |
| White text | 7.89:1 |
Values
| HEX | #51488D |
| RGB | rgb(81, 72, 141) |
| HSL | hsl(248, 32%, 42%) |
| OKLCH | oklch(44.5% 0.11 287) |
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 #51488D | 7.89:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #51488D | 2.66:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #51488D text on white | 7.89:1 | AAA | Lc 87.2 | Fine for body text |
| #51488D text on black | 2.66:1 | Fails | Lc -14.9 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D7D6F0
oklch(88.5% 0.036 287.4)
-
Step 300
300
#BDBBE9
oklch(80.9% 0.064 286.9)
-
Step 400
400
#9C97DE
oklch(70.8% 0.103 286.7)
-
Step 500
500
#857BD4
oklch(63% 0.131 287.1)
-
Step 600
600
#7063C2
oklch(55.7% 0.143 287.1)
-
Step 700
700
#5E51A7
oklch(49.1% 0.133 287.4)
-
Step 800
800 (this color)
#51488D
oklch(44.5% 0.11 287)
-
Step 900
900
#3F396C
oklch(37.7% 0.085 286.9)
-
Step 950
950
#25223F
oklch(27.1% 0.053 287)
#51488D 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) | #2D538F | 0.052 |
| Deuteranopia (no green cones) | #2C508B | 0.052 |
| Tritanopia (no blue cones) | #405664 | 0.092 |
| Achromatopsia (no color) | #515151 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51488D
#51488D
oklch(44.5% 0.11 287)
- #5A5700
#5A5700
oklch(44.5% 0.096 107.4)
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 #51488D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.026
- Blueberry #464196 ΔE 0.032
- Dark Slate Blue #483D8B ΔE 0.034
- Dusk #4E5481 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.057
- Dusk Blue #26538D ΔE 0.059
- Dusky Blue #475F94 ΔE 0.063
- Rebecca Purple #663399 ΔE 0.063
Use #51488D 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.