#403CA8
Closest named color: Blueberry (#464196). oklch(42.9% 0.168 278.3), rgb(64, 60, 168).
Aa
White text reads best on this color (8.64:1).
About this color
#403CA8 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.168 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.034 away. White text reads best on it, at 8.64:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.42:1 |
| White text | 8.64:1 |
Values
| HEX | #403CA8 |
| RGB | rgb(64, 60, 168) |
| HSL | hsl(242, 47%, 45%) |
| OKLCH | oklch(42.9% 0.168 278.3) |
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 #403CA8 | 8.64:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #403CA8 | 2.42:1 | Fails | Lc 14.8 | Not readable |
| #403CA8 text on white | 8.64:1 | AAA | Lc 89.2 | Fine for body text |
| #403CA8 text on black | 2.42:1 | Fails | Lc -13.1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E8FD
oklch(93.5% 0.029 279.4)
-
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
#7275FE
oklch(63.1% 0.199 278.1)
-
Step 600
600
#5E58EE
oklch(55.6% 0.218 278.4)
-
Step 700
700
#4E47CF
oklch(49.2% 0.202 278.2)
-
Step 800
800 (this color)
#403CA8
oklch(42.9% 0.168 278.3)
-
Step 900
900
#353584
oklch(37.8% 0.129 278.2)
-
Step 950
950
#1F204E
oklch(27.2% 0.083 278.4)
#403CA8 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) | #0050AB | 0.063 |
| Deuteranopia (no green cones) | #0047A6 | 0.056 |
| Tritanopia (no blue cones) | #00576C | 0.141 |
| Achromatopsia (no color) | #4C4C4C | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403CA8
#403CA8
oklch(42.9% 0.168 278.3)
- #5D4F00
#5D4F00
oklch(42.9% 0.088 97.4)
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 #403CA8, closest first.
No curated palette has a color within ΔE 0.04 of #403CA8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.034
- Sapphire #2138AB ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.049
- Majorelle Blue #3F37C9 ΔE 0.053
- Blue With A Hint Of Purple #533CC6 ΔE 0.056
- Blue Blue #2242C7 ΔE 0.060
- Cobalt #1E488F ΔE 0.063
- Indigo Blue #3A18B1 ΔE 0.063
Use #403CA8 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.