#51455B
Closest named color: Charcoal Grey (#3C4142). oklch(41.1% 0.039 309.4), rgb(81, 69, 91).
Aa
White text reads best on this color (8.92:1).
About this color
#51455B is a dark, muted purple. In OKLCH its lightness is 41%, its chroma 0.039 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.057 away. White text reads best on it, at 8.92:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | muted (0.039) |
| Temperature | in between |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.35:1 |
| White text | 8.92:1 |
Values
| HEX | #51455B |
| RGB | rgb(81, 69, 91) |
| HSL | hsl(273, 14%, 31%) |
| OKLCH | oklch(41.1% 0.039 309.4) |
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 #51455B | 8.92:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #51455B | 2.35:1 | Fails | Lc 13.5 | Not readable |
| #51455B text on white | 8.92:1 | AAA | Lc 90.5 | Preferred for body text |
| #51455B text on black | 2.35:1 | Fails | Lc -11.8 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EBE9ED
oklch(93.7% 0.006 308.4)
-
Step 200
200
#DBD7E0
oklch(88.5% 0.013 306)
-
Step 300
300
#C5BDCC
oklch(80.9% 0.023 309.5)
-
Step 400
400
#A79BB2
oklch(70.7% 0.036 308.8)
-
Step 500
500
#92829F
oklch(63.1% 0.047 309.8)
-
Step 600
600
#7C6B8A
oklch(55.5% 0.051 309.5)
-
Step 700
700
#695A75
oklch(49.2% 0.046 309.8)
-
Step 800
800 (this color)
#51455B
oklch(41.1% 0.039 309.4)
-
Step 900
900
#463D4E
oklch(37.6% 0.031 308.8)
-
Step 950
950
#29242E
oklch(27% 0.02 307.7)
#51455B 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) | #42495C | 0.026 |
| Deuteranopia (no green cones) | #444A5A | 0.025 |
| Tritanopia (no blue cones) | #50484D | 0.028 |
| Achromatopsia (no color) | #4A4A4A | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51455B
#51455B
oklch(41.1% 0.039 309.4)
- #444F38
#444F38
oklch(41.1% 0.04 128.8)
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 #51455B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.057
- Purple Brown #673A3F ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.059
- Dusty Grape #545775 ΔE 0.060
- Dark Slate Gray #2F4F4F ΔE 0.065
- Charcoal #264653 ΔE 0.066
- Dusk #4E5481 ΔE 0.067
- YInMn Blue #415A77 ΔE 0.068
Use #51455B 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.