#404C80
Closest named color: Twilight (#4E518B). oklch(43.1% 0.087 272.4), rgb(64, 76, 128).
Aa
White text reads best on this color (8.19:1).
About this color
#404C80 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.087 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.031 away. White text reads best on it, at 8.19:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.56:1 |
| White text | 8.19:1 |
Values
| HEX | #404C80 |
| RGB | rgb(64, 76, 128) |
| HSL | hsl(229, 33%, 38%) |
| OKLCH | oklch(43.1% 0.087 272.4) |
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 #404C80 | 8.19:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #404C80 | 2.56:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #404C80 text on white | 8.19:1 | AAA | Lc 88.2 | Fine for body text |
| #404C80 text on black | 2.56:1 | Fails | Lc -13.9 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D2D8ED
oklch(88.4% 0.03 273.1)
-
Step 300
300
#B5BFE2
oklch(80.8% 0.051 272.7)
-
Step 400
400
#8F9ED4
oklch(70.8% 0.081 272.2)
-
Step 500
500
#7485C9
oklch(63.2% 0.105 272.4)
-
Step 600
600
#5D6DB5
oklch(55.5% 0.113 272.7)
-
Step 700
700
#4D5B9C
oklch(49.1% 0.105 272.8)
-
Step 800
800 (this color)
#404C80
oklch(43.1% 0.087 272.4)
-
Step 900
900
#353F66
oklch(37.8% 0.068 271.9)
-
Step 950
950
#1F253C
oklch(27% 0.044 272.1)
#404C80 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) | #385282 | 0.019 |
| Deuteranopia (no green cones) | #324C7F | 0.018 |
| Tritanopia (no blue cones) | #275760 | 0.077 |
| Achromatopsia (no color) | #4F4F4F | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404C80
#404C80
oklch(43.1% 0.087 272.4)
- #614E02
#614E02
oklch(43.1% 0.087 92.4)
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 #404C80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.031
- Dusk #4E5481 ΔE 0.033
- Dusk Blue #26538D ΔE 0.036
- Light Navy #155084 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.048
- YInMn Blue #415A77 ΔE 0.048
Use #404C80 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.