#51538E
Closest named color: Twilight (#4E518B). oklch(46.8% 0.095 280.6), rgb(81, 83, 142).
Aa
White text reads best on this color (7.05:1).
About this color
#51538E is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.095 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 7.05:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #51538E |
| RGB | rgb(81, 83, 142) |
| HSL | hsl(238, 27%, 44%) |
| OKLCH | oklch(46.8% 0.095 280.6) |
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 #51538E | 7.05:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #51538E | 2.97:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #51538E text on white | 7.05:1 | AAA | Lc 84.4 | Fine for body text |
| #51538E text on black | 2.97:1 | Fails | Lc -17.6 | 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
#BABEDE
oklch(80.9% 0.045 279.7)
-
Step 400
400
#989CCE
oklch(70.8% 0.073 280.8)
-
Step 500
500
#7F83C1
oklch(63.2% 0.093 280.5)
-
Step 600
600
#696CAE
oklch(55.8% 0.102 280.6)
-
Step 700
700 (this color)
#51538E
oklch(46.8% 0.095 280.6)
-
Step 800
800
#474979
oklch(42.6% 0.079 280.7)
-
Step 900
900
#3C3E61
oklch(37.8% 0.06 280.6)
-
Step 950
950
#232439
oklch(27% 0.039 281.4)
#51538E 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) | #3E5B90 | 0.031 |
| Deuteranopia (no green cones) | #3A568D | 0.031 |
| Tritanopia (no blue cones) | #3E5F69 | 0.084 |
| Achromatopsia (no color) | #595959 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51538E
#51538E
oklch(46.8% 0.095 280.6)
- #665B07
#665B07
oklch(46.8% 0.095 100.9)
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 #51538E, 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 0.023
- Denim Blue #3B5B92 ΔE 0.034
- Dusky Blue #475F94 ΔE 0.034
- Dusty Grape #545775 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.048
- Denim #3B638C ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
Use #51538E 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.