#404370
Closest named color: Dark Grey Blue (#29465B). oklch(40.2% 0.075 279.5), rgb(64, 67, 112).
Aa
White text reads best on this color (9.31:1).
About this color
#404370 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.075 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.052 away. White text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #404370 |
| RGB | rgb(64, 67, 112) |
| HSL | hsl(236, 27%, 35%) |
| OKLCH | oklch(40.2% 0.075 279.5) |
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 #404370 | 9.31:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #404370 | 2.25:1 | Fails | Lc 12.5 | Not readable |
| #404370 text on white | 9.31:1 | AAA | Lc 91.4 | Preferred for body text |
| #404370 text on black | 2.25:1 | Fails | Lc -10.9 | 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 900.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D7EE
oklch(88.4% 0.032 279.8)
-
Step 300
300
#B8BDE5
oklch(80.8% 0.057 279.5)
-
Step 400
400
#959BD8
oklch(70.8% 0.089 279.5)
-
Step 500
500
#7B81CE
oklch(63.1% 0.115 279.1)
-
Step 600
600
#6569BB
oklch(55.6% 0.126 279.4)
-
Step 700
700
#5457A1
oklch(49.1% 0.117 279.4)
-
Step 800
800
#454883
oklch(42.8% 0.097 279.3)
-
Step 900
900 (this color)
#404370
oklch(40.2% 0.075 279.5)
-
Step 950
950
#22243D
oklch(27.1% 0.046 279.3)
#404370 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) | #334972 | 0.023 |
| Deuteranopia (no green cones) | #31456F | 0.022 |
| Tritanopia (no blue cones) | #314C54 | 0.066 |
| Achromatopsia (no color) | #474747 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404370
#404370
oklch(40.2% 0.075 279.5)
- #52490F
#52490F
oklch(40.3% 0.075 100.1)
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 #404370, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.052
- Twilight Blue #0A437A ΔE 0.057
- Light Navy #155084 ΔE 0.058
- Dusk #4E5481 ΔE 0.059
- Twilight #4E518B ΔE 0.061
- Cobalt #1E488F ΔE 0.062
- Dusk Blue #26538D ΔE 0.063
Use #404370 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.