#51498C
Closest named color: Twilight (#4E518B). oklch(44.6% 0.107 286.7), rgb(81, 73, 140).
Aa
White text reads best on this color (7.83:1).
About this color
#51498C is a dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.107 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.022 away. White text reads best on it, at 7.83:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.68:1 |
| White text | 7.83:1 |
Values
| HEX | #51498C |
| RGB | rgb(81, 73, 140) |
| HSL | hsl(247, 31%, 42%) |
| OKLCH | oklch(44.6% 0.107 286.7) |
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 #51498C | 7.83:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #51498C | 2.68:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #51498C text on white | 7.83:1 | AAA | Lc 87.0 | Fine for body text |
| #51498C text on black | 2.68:1 | Fails | Lc -15.1 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E8E8F6
oklch(93.5% 0.019 286)
-
Step 200
200
#D7D6F0
oklch(88.5% 0.036 287.4)
-
Step 300
300
#BDBBE8
oklch(80.9% 0.063 286.9)
-
Step 400
400
#9C97DC
oklch(70.7% 0.1 286.9)
-
Step 500
500
#857CD3
oklch(63.2% 0.128 286.9)
-
Step 600
600
#6F63C0
oklch(55.5% 0.14 286.8)
-
Step 700
700
#5D52A5
oklch(49.1% 0.129 286.7)
-
Step 800
800 (this color)
#51498C
oklch(44.6% 0.107 286.7)
-
Step 900
900
#3F396B
oklch(37.6% 0.084 287.2)
-
Step 950
950
#25223F
oklch(27.1% 0.053 287)
#51498C 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) | #2F548E | 0.051 |
| Deuteranopia (no green cones) | #2E508A | 0.049 |
| Tritanopia (no blue cones) | #405764 | 0.091 |
| Achromatopsia (no color) | #525252 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51498C
#51498C
oklch(44.6% 0.107 286.7)
- #5B5700
#5B5700
oklch(44.6% 0.095 106.6)
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 #51498C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.022
- Blueberry #464196 ΔE 0.035
- Dark Slate Blue #483D8B ΔE 0.037
- Dusk #4E5481 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.054
- Dusk Blue #26538D ΔE 0.057
- Dusky Blue #475F94 ΔE 0.060
- Dusty Grape #545775 ΔE 0.062
Use #51498C 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.