#404270
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.077 280.4), rgb(64, 66, 112).
Aa
White text reads best on this color (9.41:1).
About this color
#404270 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.077 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.051 away. White text reads best on it, at 9.41:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.41:1 |
Values
| HEX | #404270 |
| RGB | rgb(64, 66, 112) |
| HSL | hsl(238, 27%, 35%) |
| OKLCH | oklch(39.9% 0.077 280.4) |
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 #404270 | 9.41:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #404270 | 2.23:1 | Fails | Lc 12.3 | Not readable |
| #404270 text on white | 9.41:1 | AAA | Lc 91.7 | Preferred for body text |
| #404270 text on black | 2.23:1 | Fails | Lc -10.7 | 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 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
#D5D7EF
oklch(88.5% 0.033 281.9)
-
Step 300
300
#B9BDE6
oklch(80.9% 0.058 280.6)
-
Step 400
400
#959AD9
oklch(70.6% 0.092 280.3)
-
Step 500
500
#7C80CF
oklch(63% 0.118 280.2)
-
Step 600
600
#6668BC
oklch(55.5% 0.128 280.3)
-
Step 700
700
#5556A2
oklch(49% 0.12 280.5)
-
Step 800
800
#464783
oklch(42.7% 0.098 280.7)
-
Step 900
900 (this color)
#404270
oklch(39.9% 0.077 280.4)
-
Step 950
950
#22233E
oklch(26.9% 0.05 280.9)
#404270 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) | #324872 | 0.024 |
| Deuteranopia (no green cones) | #2F456F | 0.025 |
| Tritanopia (no blue cones) | #314B53 | 0.068 |
| Achromatopsia (no color) | #464646 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404270
#404270
oklch(39.9% 0.077 280.4)
- #51480B
#51480B
oklch(39.9% 0.077 100.3)
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 #404270, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.053
- Twilight Blue #0A437A ΔE 0.057
- Light Navy #155084 ΔE 0.060
- Dusk #4E5481 ΔE 0.061
- Cobalt #1E488F ΔE 0.062
- Twilight #4E518B ΔE 0.063
- Dusk Blue #26538D ΔE 0.065
Use #404270 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.