#403AA9
Closest named color: Blueberry (#464196). oklch(42.7% 0.171 278.7), rgb(64, 58, 169).
Aa
White text reads best on this color (8.76:1).
About this color
#403AA9 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.171 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.037 away. White text reads best on it, at 8.76:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.39:1 |
| White text | 8.76:1 |
Values
| HEX | #403AA9 |
| RGB | rgb(64, 58, 169) |
| HSL | hsl(243, 49%, 45%) |
| OKLCH | oklch(42.7% 0.171 278.7) |
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 #403AA9 | 8.76:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #403AA9 | 2.39:1 | Fails | Lc 14.5 | Not readable |
| #403AA9 text on white | 8.76:1 | AAA | Lc 89.5 | Fine for body text |
| #403AA9 text on black | 2.39:1 | Fails | Lc -12.8 | 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
#E5E8FE
oklch(93.5% 0.03 279.6)
-
Step 200
200
#D0D6FE
oklch(88.4% 0.055 278.5)
-
Step 300
300
#B2BBFF
oklch(81% 0.097 278.2)
-
Step 400
400
#8C94FF
oklch(70.7% 0.155 278.4)
-
Step 500
500
#7374FF
oklch(63.1% 0.202 278.6)
-
Step 600
600
#5F56F0
oklch(55.5% 0.223 278.9)
-
Step 700
700
#4F45D1
oklch(49.1% 0.207 278.8)
-
Step 800
800 (this color)
#403AA9
oklch(42.7% 0.171 278.7)
-
Step 900
900
#353486
oklch(37.7% 0.134 278.4)
-
Step 950
950
#1F1F4E
oklch(26.9% 0.084 279.1)
#403AA9 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) | #004FAC | 0.064 |
| Deuteranopia (no green cones) | #0046A7 | 0.057 |
| Tritanopia (no blue cones) | #00566C | 0.143 |
| Achromatopsia (no color) | #4B4B4B | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403AA9
#403AA9
oklch(42.7% 0.171 278.7)
- #5B4F00
#5B4F00
oklch(42.7% 0.088 99.2)
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 #403AA9, closest first.
No curated palette has a color within ΔE 0.04 of #403AA9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.037
- Sapphire #2138AB ΔE 0.041
- Majorelle Blue #3F37C9 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.052
- Blue With A Hint Of Purple #533CC6 ΔE 0.056
- Indigo Blue #3A18B1 ΔE 0.059
- Blue Blue #2242C7 ΔE 0.060
- Blurple #5539CC ΔE 0.065
Use #403AA9 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.