#401ECB
Closest named color: Violet Blue (#510AC9). oklch(42.6% 0.238 278.2), rgb(64, 30, 203).
Aa
White text reads best on this color (9.26:1).
About this color
#401ECB is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.238 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 9.26:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.238) |
| Temperature | cool |
| Nearest name | Violet Blue (#510AC9) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #401ECB |
| RGB | rgb(64, 30, 203) |
| HSL | hsl(252, 74%, 46%) |
| OKLCH | oklch(42.6% 0.238 278.2) |
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 #401ECB | 9.26:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #401ECB | 2.26:1 | Fails | Lc 14.2 | Not readable |
| #401ECB text on white | 9.26:1 | AAA | Lc 89.8 | Fine for body text |
| #401ECB text on black | 2.26:1 | 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
#7274FF
oklch(63% 0.202 278.3)
-
Step 600
600
#5D4FFF
oklch(55.7% 0.249 278.1)
-
Step 700
700
#501AFC
oklch(49.1% 0.287 278.3)
-
Step 800
800 (this color)
#401ECB
oklch(42.6% 0.238 278.2)
-
Step 900
900
#3425A0
oklch(37.7% 0.186 278.2)
-
Step 950
950
#1D195D
oklch(27% 0.116 277.8)
#401ECB 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) | #004ED0 | 0.087 |
| Deuteranopia (no green cones) | #0040C8 | 0.067 |
| Tritanopia (no blue cones) | #005779 | 0.185 |
| Achromatopsia (no color) | #474747 | 0.239 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #401ECB
#401ECB
oklch(42.6% 0.238 278.2)
- #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 #401ECB, closest first.
No curated palette has a color within ΔE 0.04 of #401ECB.
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 0.035
- Indigo Blue #3A18B1 ΔE 0.046
- Purple Blue #5D21D0 ΔE 0.054
- Blurple #5539CC ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.060
- Blue Blue #2242C7 ΔE 0.060
- Ultramarine Blue #1805DB ΔE 0.065
Use #401ECB 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.