#405B99
Closest named color: Denim Blue (#3B5B92). oklch(48% 0.105 264.9), rgb(64, 91, 153).
Aa
White text reads best on this color (6.61:1).
About this color
#405B99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.105 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.013 away. White text reads best on it, at 6.61:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #405B99 |
| RGB | rgb(64, 91, 153) |
| HSL | hsl(222, 41%, 43%) |
| OKLCH | oklch(48% 0.105 264.9) |
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 #405B99 | 6.61:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #405B99 | 3.17:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #405B99 text on white | 6.61:1 | AA | Lc 82.6 | Fine for body text |
| #405B99 text on black | 3.17:1 | AA large text | Lc -19.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B1C1E2
oklch(81% 0.05 264.8)
-
Step 400
400
#88A0D4
oklch(70.7% 0.081 265.2)
-
Step 500
500
#6A88C9
oklch(63.1% 0.104 264.7)
-
Step 600
600
#5271B6
oklch(55.7% 0.114 264.7)
-
Step 700
700 (this color)
#405B99
oklch(48% 0.105 264.9)
-
Step 800
800
#374D7F
oklch(42.7% 0.088 265)
-
Step 900
900
#304066
oklch(37.6% 0.069 265.9)
-
Step 950
950
#1C263C
oklch(27.1% 0.044 265)
#405B99 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) | #41619B | 0.017 |
| Deuteranopia (no green cones) | #365998 | 0.014 |
| Tritanopia (no blue cones) | #006972 | 0.096 |
| Achromatopsia (no color) | #5D5D5D | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405B99
#405B99
oklch(48% 0.105 264.9)
- #775800
#775800
oklch(48% 0.098 84.7)
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 #405B99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.013
- Dusky Blue #475F94 ΔE 0.018
- Twilight #4E518B ΔE 0.035
- Denim #3B638C ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.035
- Dusk #4E5481 ΔE 0.042
- Dusk Blue #26538D ΔE 0.043
- Peacock Blue #016795 ΔE 0.050
Use #405B99 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.