#363A8D
Closest named color: Dark Slate Blue (#483D8B). oklch(39.5% 0.135 276.2), rgb(54, 58, 141).
Aa
White text reads best on this color (9.78:1).
About this color
#363A8D is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.135 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 9.78:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #363A8D |
| RGB | rgb(54, 58, 141) |
| HSL | hsl(237, 45%, 38%) |
| OKLCH | oklch(39.5% 0.135 276.2) |
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 #363A8D | 9.78:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #363A8D | 2.14:1 | Fails | Lc 11.6 | Not readable |
| #363A8D text on white | 9.78:1 | AAA | Lc 92.3 | Preferred for body text |
| #363A8D text on black | 2.14:1 | Fails | Lc -10.1 | 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
#CFD7FF
oklch(88.6% 0.056 276.3)
-
Step 300
300
#B0BCFF
oklch(81% 0.096 276.2)
-
Step 400
400
#8895FF
oklch(70.6% 0.155 276.4)
-
Step 500
500
#6D76FF
oklch(63% 0.2 276.2)
-
Step 600
600
#5858F3
oklch(55.6% 0.226 276.2)
-
Step 700
700
#4946D3
oklch(49% 0.209 276.3)
-
Step 800
800
#3B3BAB
oklch(42.7% 0.174 276.1)
-
Step 900
900 (this color)
#363A8D
oklch(39.5% 0.135 276.2)
-
Step 950
950
#1D204F
oklch(27.1% 0.085 276.4)
#363A8D 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) | #004890 | 0.051 |
| Deuteranopia (no green cones) | #00408B | 0.046 |
| Tritanopia (no blue cones) | #004E5D | 0.117 |
| Achromatopsia (no color) | #444444 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #363A8D
#363A8D
oklch(39.5% 0.135 276.2)
- #534600
#534600
oklch(39.6% 0.082 97)
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 #363A8D, 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 0.035
- Cobalt #1E488F ΔE 0.042
- Sapphire #2138AB ΔE 0.056
- Twilight Blue #0A437A ΔE 0.058
- Light Navy #155084 ΔE 0.068
- Dusk Blue #26538D ΔE 0.068
- Twilight #4E518B ΔE 0.077
Use #363A8D 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.