#404E90
Closest named color: Twilight (#4E518B). oklch(44.6% 0.109 272.3), rgb(64, 78, 144).
Aa
White text reads best on this color (7.74:1).
About this color
#404E90 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.109 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.025 away. White text reads best on it, at 7.74:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.71:1 |
| White text | 7.74:1 |
Values
| HEX | #404E90 |
| RGB | rgb(64, 78, 144) |
| HSL | hsl(229, 38%, 41%) |
| OKLCH | oklch(44.6% 0.109 272.3) |
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 #404E90 | 7.74:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #404E90 | 2.71:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #404E90 text on white | 7.74:1 | AAA | Lc 86.7 | Fine for body text |
| #404E90 text on black | 2.71:1 | Fails | Lc -15.4 | 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 800.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B2BFEB
oklch(81% 0.064 272)
-
Step 400
400
#8B9CE1
oklch(70.7% 0.103 272.9)
-
Step 500
500
#6F83D8
oklch(63.2% 0.13 272.2)
-
Step 600
600
#586BC5
oklch(55.7% 0.141 272.1)
-
Step 700
700
#4858AA
oklch(49% 0.132 272.4)
-
Step 800
800 (this color)
#404E90
oklch(44.6% 0.109 272.3)
-
Step 900
900
#323D6E
oklch(37.6% 0.085 272.2)
-
Step 950
950
#1D2441
oklch(26.9% 0.055 272)
#404E90 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) | #315692 | 0.026 |
| Deuteranopia (no green cones) | #284F8F | 0.028 |
| Tritanopia (no blue cones) | #175C68 | 0.096 |
| Achromatopsia (no color) | #535353 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404E90
#404E90
oklch(44.6% 0.109 272.3)
- #665200
#665200
oklch(44.6% 0.091 92.5)
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 #404E90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.025
- Dusk Blue #26538D ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.036
- Blueberry #464196 ΔE 0.037
- Dusk #4E5481 ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.043
- Cobalt #1E488F ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.045
Use #404E90 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.