#451B9D
Closest named color: Imperial Purple (#480CA8). oklch(37.8% 0.189 288.3), rgb(69, 27, 157).
Aa
White text reads best on this color (11.07:1).
About this color
#451B9D is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.189 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Imperial Purple (#480CA8), ΔE 0.021 away. White text reads best on it, at 11.07:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Imperial Purple (#480CA8) |
| Black text | 1.89:1 |
| White text | 11.07:1 |
Values
| HEX | #451B9D |
| RGB | rgb(69, 27, 157) |
| HSL | hsl(259, 71%, 36%) |
| OKLCH | oklch(37.8% 0.189 288.3) |
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 #451B9D | 11.07:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #451B9D | 1.89:1 | Fails | Lc 9.5 | Not readable |
| #451B9D text on white | 11.07:1 | AAA | Lc 94.4 | Preferred for body text |
| #451B9D text on black | 1.89:1 | Fails | Lc -8.2 | 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
#D7D4FF
oklch(88.6% 0.059 288.3)
-
Step 300
300
#BDB6FF
oklch(80.8% 0.102 288.3)
-
Step 400
400
#9E8DFF
oklch(70.8% 0.163 288.4)
-
Step 500
500
#896AFF
oklch(63.1% 0.212 288.4)
-
Step 600
600
#773DFF
oklch(55.6% 0.263 288.2)
-
Step 700
700
#6800F1
oklch(49.1% 0.281 288.2)
-
Step 800
800
#5503C7
oklch(42.6% 0.242 288.3)
-
Step 900
900 (this color)
#451B9D
oklch(37.8% 0.189 288.3)
-
Step 950
950
#27145C
oklch(27% 0.12 287.6)
#451B9D 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) | #003EA0 | 0.090 |
| Deuteranopia (no green cones) | #00389B | 0.086 |
| Tritanopia (no blue cones) | #1F435D | 0.153 |
| Achromatopsia (no color) | #3C3C3C | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #451B9D
#451B9D
oklch(37.8% 0.189 288.3)
- #464500
#464500
oklch(37.9% 0.082 108.8)
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 #451B9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Purple #480CA8 ΔE 0.021
- Indigo Blue #3A18B1 ΔE 0.041
- Chrysanthemum #560BAD ΔE 0.041
- Indigo #4B0082 ΔE 0.059
- Sapphire #2138AB ΔE 0.073
- Violet Blue #510AC9 ΔE 0.073
- Dark Slate Blue #483D8B ΔE 0.074
- Blueberry #464196 ΔE 0.076
Use #451B9D 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.