#403974
Closest named color: Dark Slate Blue (#483D8B). oklch(38.3% 0.098 286.2), rgb(64, 57, 116).
Aa
White text reads best on this color (10.21:1).
About this color
#403974 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.098 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.042 away. White text reads best on it, at 10.21:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.05:1 |
| White text | 10.21:1 |
Values
| HEX | #403974 |
| RGB | rgb(64, 57, 116) |
| HSL | hsl(247, 34%, 34%) |
| OKLCH | oklch(38.3% 0.098 286.2) |
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 #403974 | 10.21:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #403974 | 2.05:1 | Fails | Lc 10.4 | Not readable |
| #403974 text on white | 10.21:1 | AAA | Lc 93.6 | Preferred for body text |
| #403974 text on black | 2.05:1 | Fails | Lc -9.0 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F4
oklch(88.5% 0.041 285.5)
-
Step 300
300
#BCBAEE
oklch(80.8% 0.073 286.4)
-
Step 400
400
#9B95E6
oklch(70.7% 0.117 286.4)
-
Step 500
500
#8479DF
oklch(63.2% 0.15 286.2)
-
Step 600
600
#6F5FCC
oklch(55.6% 0.163 286.6)
-
Step 700
700
#5D4EB1
oklch(49.2% 0.151 286.4)
-
Step 800
800
#4C408F
oklch(42.7% 0.126 286.8)
-
Step 900
900 (this color)
#403974
oklch(38.3% 0.098 286.2)
-
Step 950
950
#242143
oklch(27% 0.062 285.5)
#403974 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) | #214376 | 0.047 |
| Deuteranopia (no green cones) | #203F73 | 0.045 |
| Tritanopia (no blue cones) | #304551 | 0.082 |
| Achromatopsia (no color) | #414141 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403974
#403974
oklch(38.3% 0.098 286.2)
- #494500
#494500
oklch(38.2% 0.081 105.9)
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 #403974, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.042
- Blueberry #464196 ΔE 0.060
- Twilight Blue #0A437A ΔE 0.060
- Cobalt #1E488F ΔE 0.066
- Dark Grey Blue #29465B ΔE 0.072
- Marine Blue #01386A ΔE 0.073
- Prussian Blue #1D3557 ΔE 0.075
- Light Navy #155084 ΔE 0.075
Use #403974 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.