#404275
Closest named color: Dark Slate Blue (#483D8B). oklch(40.3% 0.085 280.2), rgb(64, 66, 117).
Aa
White text reads best on this color (9.31:1).
About this color
#404275 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.085 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.043 away. White text reads best on it, at 9.31:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #404275 |
| RGB | rgb(64, 66, 117) |
| HSL | hsl(238, 29%, 35%) |
| OKLCH | oklch(40.3% 0.085 280.2) |
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 #404275 | 9.31:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #404275 | 2.25:1 | Fails | Lc 12.5 | Not readable |
| #404275 text on white | 9.31:1 | AAA | Lc 91.4 | Preferred for body text |
| #404275 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 800.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D5D8EC
oklch(88.6% 0.028 279)
-
Step 300
300
#BABEE1
oklch(81% 0.049 280.1)
-
Step 400
400
#979BD2
oklch(70.7% 0.08 280.9)
-
Step 500
500
#7E82C6
oklch(63.1% 0.102 280.5)
-
Step 600
600
#676BB2
oklch(55.6% 0.109 279.8)
-
Step 700
700
#565999
oklch(49.1% 0.101 279.9)
-
Step 800
800 (this color)
#404275
oklch(40.3% 0.085 280.2)
-
Step 900
900
#3B3D64
oklch(37.7% 0.066 280.5)
-
Step 950
950
#22243B
oklch(27% 0.043 279.3)
#404275 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) | #2F4977 | 0.028 |
| Deuteranopia (no green cones) | #2C4574 | 0.028 |
| Tritanopia (no blue cones) | #2F4C56 | 0.073 |
| Achromatopsia (no color) | #474747 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404275
#404275
oklch(40.3% 0.085 280.2)
- #534900
#534900
oklch(40.3% 0.084 100.4)
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 #404275, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Twilight Blue #0A437A ΔE 0.056
- Cobalt #1E488F ΔE 0.056
- Blueberry #464196 ΔE 0.056
- Light Navy #155084 ΔE 0.057
- Twilight #4E518B ΔE 0.058
- Dusk #4E5481 ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.060
Use #404275 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.