#51538F
Closest named color: Twilight (#4E518B). oklch(46.9% 0.096 280.6), rgb(81, 83, 143).
Aa
White text reads best on this color (7.03:1).
About this color
#51538F is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.096 and its hue 281°. 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 7.03:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #51538F |
| RGB | rgb(81, 83, 143) |
| HSL | hsl(238, 28%, 44%) |
| OKLCH | oklch(46.9% 0.096 280.6) |
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 #51538F | 7.03:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #51538F | 2.98:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #51538F text on white | 7.03:1 | AAA | Lc 84.3 | Fine for body text |
| #51538F text on black | 2.98:1 | Fails | Lc -17.7 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D5D8EA
oklch(88.5% 0.025 278.3)
-
Step 300
300
#BABEDF
oklch(80.9% 0.047 279.8)
-
Step 400
400
#979CCF
oklch(70.7% 0.075 280)
-
Step 500
500
#7F83C2
oklch(63.2% 0.094 280.5)
-
Step 600
600
#686BAE
oklch(55.5% 0.103 280.5)
-
Step 700
700 (this color)
#51538F
oklch(46.9% 0.096 280.6)
-
Step 800
800
#47497A
oklch(42.7% 0.081 280.6)
-
Step 900
900
#3B3D62
oklch(37.6% 0.063 280.5)
-
Step 950
950
#232439
oklch(27% 0.039 281.4)
#51538F 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) | #3D5B91 | 0.032 |
| Deuteranopia (no green cones) | #3A578E | 0.032 |
| Tritanopia (no blue cones) | #3E5F6A | 0.083 |
| Achromatopsia (no color) | #595959 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51538F
#51538F
oklch(46.9% 0.096 280.6)
- #675B04
#675B04
oklch(46.9% 0.096 100.2)
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 #51538F, 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 0.025
- Denim Blue #3B5B92 ΔE 0.034
- Dusky Blue #475F94 ΔE 0.034
- Dusty Grape #545775 ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.048
- Denim #3B638C ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
Use #51538F 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.