#51437E
Closest named color: Dark Slate Blue (#483D8B). oklch(42.6% 0.096 292.8), rgb(81, 67, 126).
Aa
White text reads best on this color (8.55:1).
About this color
#51437E is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.096 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.034 away. White text reads best on it, at 8.55:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.096) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.45:1 |
| White text | 8.55:1 |
Values
| HEX | #51437E |
| RGB | rgb(81, 67, 126) |
| HSL | hsl(254, 31%, 38%) |
| OKLCH | oklch(42.6% 0.096 292.8) |
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 #51437E | 8.55:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #51437E | 2.45:1 | Fails | Lc 14.7 | Not readable |
| #51437E text on white | 8.55:1 | AAA | Lc 89.3 | Fine for body text |
| #51437E text on black | 2.45:1 | Fails | Lc -12.9 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#D9D6EC
oklch(88.5% 0.03 292)
-
Step 300
300
#C1BAE2
oklch(80.8% 0.056 293.1)
-
Step 400
400
#A296D4
oklch(70.6% 0.09 292.8)
-
Step 500
500
#8C7BC8
oklch(63% 0.115 293)
-
Step 600
600
#7763B5
oklch(55.6% 0.125 293.1)
-
Step 700
700
#64529C
oklch(49.1% 0.116 292.8)
-
Step 800
800 (this color)
#51437E
oklch(42.6% 0.096 292.8)
-
Step 900
900
#433966
oklch(37.7% 0.076 292.6)
-
Step 950
950
#27223B
oklch(27% 0.046 292.2)
#51437E 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) | #2F4D80 | 0.053 |
| Deuteranopia (no green cones) | #314B7D | 0.050 |
| Tritanopia (no blue cones) | #464E5A | 0.079 |
| Achromatopsia (no color) | #4C4C4C | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51437E
#51437E
oklch(42.6% 0.096 292.8)
- #505300
#505300
oklch(42.5% 0.094 112.2)
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 #51437E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Twilight #4E518B ΔE 0.040
- Blueberry #464196 ΔE 0.045
- Dusk #4E5481 ΔE 0.047
- Dusty Grape #545775 ΔE 0.064
- Dusk Blue #26538D ΔE 0.067
- Rebecca Purple #663399 ΔE 0.070
- Cobalt #1E488F ΔE 0.070
Use #51437E 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.