#451B9B
Closest named color: Imperial Purple (#480CA8). oklch(37.6% 0.187 288.7), rgb(69, 27, 155).
Aa
White text reads best on this color (11.15:1).
About this color
#451B9B is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.187 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Imperial Purple (#480CA8), ΔE 0.024 away. White text reads best on it, at 11.15:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Imperial Purple (#480CA8) |
| Black text | 1.88:1 |
| White text | 11.15:1 |
Values
| HEX | #451B9B |
| RGB | rgb(69, 27, 155) |
| HSL | hsl(260, 70%, 36%) |
| OKLCH | oklch(37.6% 0.187 288.7) |
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 #451B9B | 11.15:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #451B9B | 1.88:1 | Fails | Lc 9.3 | Not readable |
| #451B9B text on white | 11.15:1 | AAA | Lc 94.6 | Preferred for body text |
| #451B9B text on black | 1.88:1 | Fails | Lc -8.0 | 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
#E8E7FF
oklch(93.6% 0.032 287.7)
-
Step 200
200
#D7D3FF
oklch(88.4% 0.06 289.3)
-
Step 300
300
#BEB6FF
oklch(80.9% 0.102 288.9)
-
Step 400
400
#9E8CFF
oklch(70.6% 0.164 288.7)
-
Step 500
500
#8A69FF
oklch(63.1% 0.213 288.9)
-
Step 600
600
#783CFF
oklch(55.5% 0.264 288.7)
-
Step 700
700
#6900F0
oklch(49.1% 0.28 288.7)
-
Step 800
800
#5607C6
oklch(42.8% 0.24 288.7)
-
Step 900
900 (this color)
#451B9B
oklch(37.6% 0.187 288.7)
-
Step 950
950
#28145B
oklch(27.1% 0.118 288.8)
#451B9B 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) | #003E9E | 0.091 |
| Deuteranopia (no green cones) | #003899 | 0.086 |
| Tritanopia (no blue cones) | #21425C | 0.150 |
| Achromatopsia (no color) | #3B3B3B | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #451B9B
#451B9B
oklch(37.6% 0.187 288.7)
- #454400
#454400
oklch(37.5% 0.081 108.8)
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 #451B9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Purple #480CA8 ΔE 0.024
- Chrysanthemum #560BAD ΔE 0.043
- Indigo Blue #3A18B1 ΔE 0.044
- Indigo #4B0082 ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.073
- Sapphire #2138AB ΔE 0.074
- Blueberry #464196 ΔE 0.076
- Violet Blue #510AC9 ΔE 0.076
Use #451B9B 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.