#404C8D
Closest named color: Twilight (#4E518B). oklch(44% 0.107 273.3), rgb(64, 76, 141).
Aa
White text reads best on this color (7.96:1).
About this color
#404C8D is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.107 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.027 away. White text reads best on it, at 7.96:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.63:1 |
| White text | 7.96:1 |
Values
| HEX | #404C8D |
| RGB | rgb(64, 76, 141) |
| HSL | hsl(231, 38%, 40%) |
| OKLCH | oklch(44% 0.107 273.3) |
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 #404C8D | 7.96:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #404C8D | 2.63:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #404C8D text on white | 7.96:1 | AAA | Lc 87.5 | Fine for body text |
| #404C8D text on black | 2.63:1 | Fails | Lc -14.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B3BFEA
oklch(81% 0.062 272.7)
-
Step 400
400
#8C9CDF
oklch(70.6% 0.1 273.3)
-
Step 500
500
#7182D7
oklch(63.1% 0.129 273.6)
-
Step 600
600
#5A6AC4
oklch(55.6% 0.14 273.4)
-
Step 700
700
#4A58A9
oklch(49.1% 0.13 273.3)
-
Step 800
800 (this color)
#404C8D
oklch(44% 0.107 273.3)
-
Step 900
900
#343D6E
oklch(37.7% 0.084 273.8)
-
Step 950
950
#1E2440
oklch(27% 0.053 273.2)
#404C8D 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) | #30548F | 0.027 |
| Deuteranopia (no green cones) | #274E8C | 0.029 |
| Tritanopia (no blue cones) | #1B5A65 | 0.096 |
| Achromatopsia (no color) | #515151 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404C8D
#404C8D
oklch(44% 0.107 273.3)
- #635100
#635100
oklch(44% 0.09 94.1)
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 #404C8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.027
- Dusk Blue #26538D ΔE 0.033
- Blueberry #464196 ΔE 0.035
- Dark Slate Blue #483D8B ΔE 0.040
- Dusk #4E5481 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.042
- Cobalt #1E488F ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.045
Use #404C8D 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.