#404C88
Closest named color: Twilight (#4E518B). oklch(43.6% 0.1 273.1), rgb(64, 76, 136).
Aa
White text reads best on this color (8.05:1).
About this color
#404C88 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.100 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 8.05:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.60:1 |
| White text | 8.05:1 |
Values
| HEX | #404C88 |
| RGB | rgb(64, 76, 136) |
| HSL | hsl(230, 36%, 39%) |
| OKLCH | oklch(43.6% 0.1 273.1) |
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 #404C88 | 8.05:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #404C88 | 2.60:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #404C88 text on white | 8.05:1 | AAA | Lc 87.8 | Fine for body text |
| #404C88 text on black | 2.60:1 | Fails | Lc -14.4 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE7
oklch(81% 0.058 273)
-
Step 400
400
#8D9DDB
oklch(70.7% 0.093 272.7)
-
Step 500
500
#7283D1
oklch(63% 0.119 273.2)
-
Step 600
600
#5B6CBE
oklch(55.7% 0.128 272.8)
-
Step 700
700
#4B59A4
oklch(49% 0.121 273.2)
-
Step 800
800 (this color)
#404C88
oklch(43.6% 0.1 273.1)
-
Step 900
900
#343E6B
oklch(37.8% 0.078 272.7)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#404C88 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) | #33538A | 0.023 |
| Deuteranopia (no green cones) | #2C4D87 | 0.025 |
| Tritanopia (no blue cones) | #205963 | 0.089 |
| Achromatopsia (no color) | #505050 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404C88
#404C88
oklch(43.6% 0.1 273.1)
- #625000
#625000
oklch(43.7% 0.09 93.9)
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 #404C88, 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 0.032
- Dusk #4E5481 ΔE 0.036
- Blueberry #464196 ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.043
- Cobalt #1E488F ΔE 0.043
Use #404C88 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.