#404F9A
Closest named color: Twilight (#4E518B). oklch(45.5% 0.123 272.2), rgb(64, 79, 154).
Aa
White text reads best on this color (7.49:1).
About this color
#404F9A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.123 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.033 away. White text reads best on it, at 7.49:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.80:1 |
| White text | 7.49:1 |
Values
| HEX | #404F9A |
| RGB | rgb(64, 79, 154) |
| HSL | hsl(230, 41%, 43%) |
| OKLCH | oklch(45.5% 0.123 272.2) |
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 #404F9A | 7.49:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #404F9A | 2.80:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #404F9A text on white | 7.49:1 | AAA | Lc 85.8 | Fine for body text |
| #404F9A text on black | 2.80:1 | Fails | Lc -16.2 | 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 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D0D8F4
oklch(88.5% 0.04 272.9)
-
Step 300
300
#B0BEF0
oklch(80.8% 0.073 272.5)
-
Step 400
400
#889CE8
oklch(70.8% 0.114 272)
-
Step 500
500
#6C81E1
oklch(63.1% 0.146 272.3)
-
Step 600
600
#5568CF
oklch(55.6% 0.159 272.3)
-
Step 700
700
#4556B3
oklch(49% 0.148 272.1)
-
Step 800
800 (this color)
#404F9A
oklch(45.5% 0.123 272.2)
-
Step 900
900
#313C74
oklch(37.7% 0.096 272.6)
-
Step 950
950
#1C2444
oklch(27.1% 0.06 271.3)
#404F9A 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) | #2B599D | 0.032 |
| Deuteranopia (no green cones) | #1D5198 | 0.036 |
| Tritanopia (no blue cones) | #02606D | 0.109 |
| Achromatopsia (no color) | #555555 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404F9A
#404F9A
oklch(45.5% 0.123 272.2)
- #695400
#695400
oklch(45.4% 0.093 92)
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 #404F9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.033
- Blueberry #464196 ΔE 0.036
- Dusk Blue #26538D ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.038
- Cobalt #1E488F ΔE 0.049
- Dusky Blue #475F94 ΔE 0.050
- Dusk #4E5481 ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.050
Use #404F9A 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.