#363A8B
Closest named color: Dark Slate Blue (#483D8B). oklch(39.4% 0.132 276.3), rgb(54, 58, 139).
Aa
White text reads best on this color (9.83:1).
About this color
#363A8B is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.132 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.031 away. White text reads best on it, at 9.83:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.13:1 |
| White text | 9.83:1 |
Values
| HEX | #363A8B |
| RGB | rgb(54, 58, 139) |
| HSL | hsl(237, 44%, 38%) |
| OKLCH | oklch(39.4% 0.132 276.3) |
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 #363A8B | 9.83:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #363A8B | 2.13:1 | Fails | Lc 11.5 | Not readable |
| #363A8B text on white | 9.83:1 | AAA | Lc 92.5 | Preferred for body text |
| #363A8B text on black | 2.13:1 | Fails | Lc -10.0 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CFD7FE
oklch(88.6% 0.054 276.1)
-
Step 300
300
#B0BCFF
oklch(81% 0.096 276.2)
-
Step 400
400
#8895FF
oklch(70.6% 0.155 276.4)
-
Step 500
500
#6E76FF
oklch(63.1% 0.2 276.5)
-
Step 600
600
#5959F0
oklch(55.6% 0.22 276.5)
-
Step 700
700
#4948D1
oklch(49.2% 0.205 276.1)
-
Step 800
800
#3C3CA9
oklch(42.7% 0.17 276.5)
-
Step 900
900 (this color)
#363A8B
oklch(39.4% 0.132 276.3)
-
Step 950
950
#1D204E
oklch(27% 0.083 276.5)
#363A8B 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) | #00478E | 0.050 |
| Deuteranopia (no green cones) | #004089 | 0.047 |
| Tritanopia (no blue cones) | #004D5C | 0.115 |
| Achromatopsia (no color) | #434343 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #363A8B
#363A8B
oklch(39.4% 0.132 276.3)
- #534500
#534500
oklch(39.3% 0.081 95.8)
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 #363A8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.031
- Blueberry #464196 ΔE 0.037
- Cobalt #1E488F ΔE 0.042
- Twilight Blue #0A437A ΔE 0.056
- Sapphire #2138AB ΔE 0.059
- Light Navy #155084 ΔE 0.067
- Dusk Blue #26538D ΔE 0.068
- Twilight #4E518B ΔE 0.077
Use #363A8B 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.