#45278B
Closest named color: Dark Slate Blue (#483D8B). oklch(37.5% 0.156 290.7), rgb(69, 39, 139).
Aa
White text reads best on this color (10.95:1).
About this color
#45278B is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.156 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.051 away. White text reads best on it, at 10.95:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #45278B |
| RGB | rgb(69, 39, 139) |
| HSL | hsl(258, 56%, 35%) |
| OKLCH | oklch(37.5% 0.156 290.7) |
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 #45278B | 10.95:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #45278B | 1.91:1 | Fails | Lc 9.2 | Not readable |
| #45278B text on white | 10.95:1 | AAA | Lc 94.7 | Preferred for body text |
| #45278B text on black | 1.91:1 | Fails | Lc -7.9 | 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 900.
-
Step 50
50
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E9E7FF
oklch(93.7% 0.032 289.6)
-
Step 200
200
#D8D3FF
oklch(88.5% 0.06 290.3)
-
Step 300
300
#C0B5FF
oklch(80.9% 0.104 290.7)
-
Step 400
400
#A28BFF
oklch(70.7% 0.166 290.7)
-
Step 500
500
#8E67FF
oklch(63.1% 0.216 290.7)
-
Step 600
600
#7C3CFB
oklch(55.6% 0.259 290.6)
-
Step 700
700
#692BDB
oklch(49.1% 0.241 290.4)
-
Step 800
800
#5527B1
oklch(42.7% 0.2 290.4)
-
Step 900
900 (this color)
#45278B
oklch(37.5% 0.156 290.7)
-
Step 950
950
#281952
oklch(27% 0.099 290.3)
#45278B 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) | #003E8E | 0.084 |
| Deuteranopia (no green cones) | #003A89 | 0.083 |
| Tritanopia (no blue cones) | #2E4156 | 0.125 |
| Achromatopsia (no color) | #3C3C3C | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #45278B
#45278B
oklch(37.5% 0.156 290.7)
- #434400
#434400
oklch(37.3% 0.082 110.7)
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 #45278B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.051
- Indigo #4B0082 ΔE 0.054
- Imperial Purple #480CA8 ΔE 0.055
- Blueberry #464196 ΔE 0.062
- Chrysanthemum #560BAD ΔE 0.067
- Indigo Blue #3A18B1 ΔE 0.070
- Rebecca Purple #663399 ΔE 0.074
- Royal Purple #4B006E ΔE 0.077
Use #45278B 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.