#373479
Closest named color: Dark Slate Blue (#483D8B). oklch(36.8% 0.114 281.2), rgb(55, 52, 121).
Aa
White text reads best on this color (10.88:1).
About this color
#373479 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.114 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 10.88:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.92:1 |
| White text | 10.88:1 |
Values
| HEX | #373479 |
| RGB | rgb(55, 52, 121) |
| HSL | hsl(243, 40%, 34%) |
| OKLCH | oklch(36.8% 0.114 281.2) |
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 #373479 | 10.88:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #373479 | 1.92:1 | Fails | Lc 9.0 | Not readable |
| #373479 text on white | 10.88:1 | AAA | Lc 94.9 | Preferred for body text |
| #373479 text on black | 1.92:1 | Fails | Lc -7.7 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D3D6F9
oklch(88.5% 0.048 281.5)
-
Step 300
300
#B6BBF7
oklch(80.9% 0.085 280.6)
-
Step 400
400
#9295F3
oklch(70.7% 0.136 280.9)
-
Step 500
500
#7A77EF
oklch(63% 0.175 281.2)
-
Step 600
600
#655DDE
oklch(55.7% 0.19 281)
-
Step 700
700
#544BC0
oklch(49% 0.177 281.1)
-
Step 800
800
#453F9C
oklch(42.9% 0.146 281.2)
-
Step 900
900 (this color)
#373479
oklch(36.8% 0.114 281.2)
-
Step 950
950
#212048
oklch(26.8% 0.072 281.5)
#373479 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) | #093F7B | 0.051 |
| Deuteranopia (no green cones) | #003A78 | 0.054 |
| Tritanopia (no blue cones) | #1B4451 | 0.099 |
| Achromatopsia (no color) | #3D3D3D | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373479
#373479
oklch(36.8% 0.114 281.2)
- #484000
#484000
oklch(36.8% 0.077 101.4)
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 #373479, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Twilight Blue #0A437A ΔE 0.056
- Marine Blue #01386A ΔE 0.062
- Blueberry #464196 ΔE 0.063
- Cobalt #1E488F ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.072
- Marine #042E60 ΔE 0.078
- Light Navy #155084 ΔE 0.081
Use #373479 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.