#3A366A
Closest named color: Prussian Blue (#1D3557). oklch(36.4% 0.088 284.7), rgb(58, 54, 106).
Aa
White text reads best on this color (10.96:1).
About this color
#3A366A is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.088 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.055 away. White text reads best on it, at 10.96:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.91:1 |
| White text | 10.96:1 |
Values
| HEX | #3A366A |
| RGB | rgb(58, 54, 106) |
| HSL | hsl(245, 33%, 31%) |
| OKLCH | oklch(36.4% 0.088 284.7) |
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 #3A366A | 10.96:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #3A366A | 1.91:1 | Fails | Lc 8.7 | Not readable |
| #3A366A text on white | 10.96:1 | AAA | Lc 95.2 | Preferred for body text |
| #3A366A text on black | 1.91:1 | Fails | Lc -7.4 | 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
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D6D6F1
oklch(88.4% 0.037 285.6)
-
Step 300
300
#BBBBEA
oklch(80.8% 0.066 284.8)
-
Step 400
400
#9997E0
oklch(70.6% 0.106 284.6)
-
Step 500
500
#827CD7
oklch(63.2% 0.134 284.9)
-
Step 600
600
#6C63C4
oklch(55.5% 0.146 284.8)
-
Step 700
700
#5A52A9
oklch(49.1% 0.135 284.4)
-
Step 800
800
#4A4389
oklch(42.6% 0.113 285.1)
-
Step 900
900 (this color)
#3A366A
oklch(36.4% 0.088 284.7)
-
Step 950
950
#242240
oklch(27% 0.055 285.1)
#3A366A 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) | #223E6C | 0.038 |
| Deuteranopia (no green cones) | #203B69 | 0.037 |
| Tritanopia (no blue cones) | #2B414B | 0.075 |
| Achromatopsia (no color) | #3C3C3C | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A366A
#3A366A
oklch(36.4% 0.088 284.7)
- #454000
#454000
oklch(36.5% 0.077 104.6)
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 #3A366A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.055
- Marine Blue #01386A ΔE 0.060
- Twilight Blue #0A437A ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.062
- Dark Grey Blue #29465B ΔE 0.064
- Dark Blue Grey #1F3B4D ΔE 0.070
- Marine #042E60 ΔE 0.074
- Charcoal #264653 ΔE 0.075
Use #3A366A 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.