#403BA7
Closest named color: Blueberry (#464196). oklch(42.7% 0.168 278.6), rgb(64, 59, 167).
Aa
White text reads best on this color (8.74:1).
About this color
#403BA7 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.168 and its hue 279°. 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 8.74:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.40:1 |
| White text | 8.74:1 |
Values
| HEX | #403BA7 |
| RGB | rgb(64, 59, 167) |
| HSL | hsl(243, 48%, 44%) |
| OKLCH | oklch(42.7% 0.168 278.6) |
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 #403BA7 | 8.74:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #403BA7 | 2.40:1 | Fails | Lc 14.5 | Not readable |
| #403BA7 text on white | 8.74:1 | AAA | Lc 89.4 | Fine for body text |
| #403BA7 text on black | 2.40:1 | 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
#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
#7374FE
oklch(63% 0.2 278.7)
-
Step 600
600
#5F58EE
oklch(55.7% 0.218 278.7)
-
Step 700
700
#4F46CF
oklch(49.1% 0.203 278.8)
-
Step 800
800 (this color)
#403BA7
oklch(42.7% 0.168 278.6)
-
Step 900
900
#353484
oklch(37.6% 0.131 278.6)
-
Step 950
950
#1F204D
oklch(27.1% 0.081 278.5)
#403BA7 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) | #004FAA | 0.063 |
| Deuteranopia (no green cones) | #0046A5 | 0.056 |
| Tritanopia (no blue cones) | #00566B | 0.141 |
| Achromatopsia (no color) | #4B4B4B | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403BA7
#403BA7
oklch(42.7% 0.168 278.6)
- #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 #403BA7, closest first.
No curated palette has a color within ΔE 0.04 of #403BA7.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.034
- Sapphire #2138AB ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.048
- Majorelle Blue #3F37C9 ΔE 0.055
- Blue With A Hint Of Purple #533CC6 ΔE 0.058
- Indigo Blue #3A18B1 ΔE 0.062
- Blue Blue #2242C7 ΔE 0.062
- Cobalt #1E488F ΔE 0.063
Use #403BA7 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.