#403274
Closest named color: Dark Slate Blue (#483D8B). oklch(36.9% 0.109 289.8), rgb(64, 50, 116).
Aa
White text reads best on this color (10.90:1).
About this color
#403274 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.109 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.049 away. White text reads best on it, at 10.90:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #403274 |
| RGB | rgb(64, 50, 116) |
| HSL | hsl(253, 40%, 33%) |
| OKLCH | oklch(36.9% 0.109 289.8) |
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 #403274 | 10.90:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #403274 | 1.92:1 | Fails | Lc 8.9 | Not readable |
| #403274 text on white | 10.90:1 | AAA | Lc 95.0 | Preferred for body text |
| #403274 text on black | 1.92:1 | Fails | Lc -7.6 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D8D5F6
oklch(88.6% 0.045 289.6)
-
Step 300
300
#BFB8F2
oklch(80.8% 0.081 290)
-
Step 400
400
#A091EC
oklch(70.7% 0.131 290.2)
-
Step 500
500
#8A73E6
oklch(63.1% 0.167 289.9)
-
Step 600
600
#7559D4
oklch(55.6% 0.181 289.7)
-
Step 700
700
#6348B8
oklch(49.2% 0.169 289.9)
-
Step 800
800
#503C95
oklch(42.7% 0.14 289.5)
-
Step 900
900 (this color)
#403274
oklch(36.9% 0.109 289.8)
-
Step 950
950
#261F45
oklch(26.9% 0.069 289.4)
#403274 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) | #113E76 | 0.063 |
| Deuteranopia (no green cones) | #133B73 | 0.060 |
| Tritanopia (no blue cones) | #31404E | 0.089 |
| Achromatopsia (no color) | #3D3D3D | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403274
#403274
oklch(36.9% 0.109 289.8)
- #434300
#434300
oklch(37.1% 0.081 109.8)
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 #403274, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.049
- Blueberry #464196 ΔE 0.067
- Twilight Blue #0A437A ΔE 0.070
- Marine Blue #01386A ΔE 0.074
- Prussian Blue #1D3557 ΔE 0.076
- Cobalt #1E488F ΔE 0.077
- Indigo #4B0082 ΔE 0.082
- Dark Grey Blue #29465B ΔE 0.085
Use #403274 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.