#401BCD
Closest named color: Violet Blue (#510AC9). oklch(42.6% 0.242 278.1), rgb(64, 27, 205).
Aa
White text reads best on this color (9.30:1).
About this color
#401BCD is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.242 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Violet Blue (#510AC9), ΔE 0.033 away. White text reads best on it, at 9.30:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.242) |
| Temperature | cool |
| Nearest name | Violet Blue (#510AC9) |
| Black text | 2.25:1 |
| White text | 9.30:1 |
Values
| HEX | #401BCD |
| RGB | rgb(64, 27, 205) |
| HSL | hsl(252, 77%, 45%) |
| OKLCH | oklch(42.6% 0.242 278.1) |
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 #401BCD | 9.30:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #401BCD | 2.25:1 | Fails | Lc 14.2 | Not readable |
| #401BCD text on white | 9.30:1 | AAA | Lc 89.8 | Fine for body text |
| #401BCD text on black | 2.25:1 | Fails | Lc -12.5 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D0D6FF
oklch(88.5% 0.057 278.6)
-
Step 300
300
#B2BBFF
oklch(81% 0.097 278.2)
-
Step 400
400
#8C94FF
oklch(70.7% 0.155 278.4)
-
Step 500
500
#7275FF
oklch(63.2% 0.2 278.1)
-
Step 600
600
#5D4FFF
oklch(55.7% 0.249 278.1)
-
Step 700
700
#5014FF
oklch(49.1% 0.292 278.1)
-
Step 800
800 (this color)
#401BCD
oklch(42.6% 0.242 278.1)
-
Step 900
900
#3424A1
oklch(37.7% 0.188 278.2)
-
Step 950
950
#1D185E
oklch(26.9% 0.119 278)
#401BCD 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) | #004DD2 | 0.087 |
| Deuteranopia (no green cones) | #0040CA | 0.068 |
| Tritanopia (no blue cones) | #00577A | 0.187 |
| Achromatopsia (no color) | #474747 | 0.243 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #401BCD
#401BCD
oklch(42.6% 0.242 278.1)
- #5C4F00
#5C4F00
oklch(42.8% 0.088 98.3)
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 #401BCD, closest first.
No curated palette has a color within ΔE 0.04 of #401BCD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Violet Blue #510AC9 ΔE 0.033
- Majorelle Blue #3F37C9 ΔE 0.038
- Indigo Blue #3A18B1 ΔE 0.048
- Purple Blue #5D21D0 ΔE 0.055
- Blurple #5539CC ΔE 0.060
- Blue Blue #2242C7 ΔE 0.062
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Ultramarine Blue #1805DB ΔE 0.063
Use #401BCD 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.