#403E91
Closest named color: Blueberry (#464196). oklch(41.4% 0.133 279.9), rgb(64, 62, 145).
Aa
White text reads best on this color (9.06:1).
About this color
#403E91 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.133 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.015 away. White text reads best on it, at 9.06:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #403E91 |
| RGB | rgb(64, 62, 145) |
| HSL | hsl(241, 40%, 41%) |
| OKLCH | oklch(41.4% 0.133 279.9) |
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 #403E91 | 9.06:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #403E91 | 2.31:1 | Fails | Lc 13.4 | Not readable |
| #403E91 text on white | 9.06:1 | AAA | Lc 90.6 | Preferred for body text |
| #403E91 text on black | 2.31:1 | Fails | Lc -11.8 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D3D7F6
oklch(88.6% 0.043 279.7)
-
Step 300
300
#B6BCF3
oklch(81% 0.078 279.7)
-
Step 400
400
#9297ED
oklch(70.7% 0.125 280.1)
-
Step 500
500
#797BE7
oklch(63.2% 0.159 280)
-
Step 600
600
#6361D5
oklch(55.6% 0.173 279.9)
-
Step 700
700
#524FB8
oklch(49% 0.161 279.9)
-
Step 800
800 (this color)
#403E91
oklch(41.4% 0.133 279.9)
-
Step 900
900
#383977
oklch(37.8% 0.103 279.5)
-
Step 950
950
#212246
oklch(27.2% 0.066 279.9)
#403E91 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) | #024C94 | 0.059 |
| Deuteranopia (no green cones) | #00458F | 0.058 |
| Tritanopia (no blue cones) | #1A5161 | 0.115 |
| Achromatopsia (no color) | #494949 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403E91
#403E91
oklch(41.4% 0.133 279.9)
- #574C00
#574C00
oklch(41.5% 0.086 99.8)
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 #403E91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.015
- Dark Slate Blue #483D8B ΔE 0.016
- Cobalt #1E488F ΔE 0.045
- Twilight #4E518B ΔE 0.060
- Sapphire #2138AB ΔE 0.061
- Dusk Blue #26538D ΔE 0.062
- Light Navy #155084 ΔE 0.068
- Twilight Blue #0A437A ΔE 0.070
Use #403E91 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.