#451F78
Closest named color: Indigo (#4B0082). oklch(34.7% 0.142 298), rgb(69, 31, 120).
Aa
White text reads best on this color (12.20:1).
About this color
#451F78 is a dark, vivid purple. In OKLCH its lightness is 35%, its chroma 0.142 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.039 away. White text reads best on it, at 12.20:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.72:1 |
| White text | 12.20:1 |
Values
| HEX | #451F78 |
| RGB | rgb(69, 31, 120) |
| HSL | hsl(266, 59%, 30%) |
| OKLCH | oklch(34.7% 0.142 298) |
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 #451F78 | 12.20:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #451F78 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #451F78 text on white | 12.20:1 | AAA | Lc 97.2 | Preferred for body text |
| #451F78 text on black | 1.72:1 | Fails | Lc 0.0 | 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
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#ECE6FC
oklch(93.6% 0.03 298.3)
-
Step 200
200
#DDD1FC
oklch(88.4% 0.06 297.9)
-
Step 300
300
#C9B2FD
oklch(81% 0.107 298.1)
-
Step 400
400
#AF85FC
oklch(70.7% 0.172 298.2)
-
Step 500
500
#9D60F9
oklch(63.1% 0.219 298.2)
-
Step 600
600
#893FE8
oklch(55.6% 0.237 298.1)
-
Step 700
700
#742FCA
oklch(49.1% 0.22 297.8)
-
Step 800
800
#5E29A3
oklch(42.6% 0.183 297.9)
-
Step 900
900 (this color)
#451F78
oklch(34.7% 0.142 298)
-
Step 950
950
#2D194C
oklch(27.1% 0.091 298.2)
#451F78 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) | #00357B | 0.093 |
| Deuteranopia (no green cones) | #003476 | 0.094 |
| Tritanopia (no blue cones) | #383549 | 0.108 |
| Achromatopsia (no color) | #353535 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #451F78
#451F78
oklch(34.7% 0.142 298)
- #363F00
#363F00
oklch(34.7% 0.081 118.4)
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 #451F78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.039
- Royal Purple #4B006E ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.075
- Imperial Purple #480CA8 ΔE 0.081
- Plum Purple #4E0550 ΔE 0.082
- Midnight Blue #191970 ΔE 0.086
- Grape Purple #5D1451 ΔE 0.088
- Blueberry #464196 ΔE 0.091
Use #451F78 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.