#363F8D
Closest named color: Dark Slate Blue (#483D8B). oklch(40.5% 0.128 274.2), rgb(54, 63, 141).
Aa
White text reads best on this color (9.32:1).
About this color
#363F8D is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.128 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.028 away. White text reads best on it, at 9.32:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.25:1 |
| White text | 9.32:1 |
Values
| HEX | #363F8D |
| RGB | rgb(54, 63, 141) |
| HSL | hsl(234, 45%, 38%) |
| OKLCH | oklch(40.5% 0.128 274.2) |
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 #363F8D | 9.32:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #363F8D | 2.25:1 | Fails | Lc 12.7 | Not readable |
| #363F8D text on white | 9.32:1 | AAA | Lc 91.2 | Preferred for body text |
| #363F8D text on black | 2.25:1 | Fails | Lc -11.1 | 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 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F5
oklch(88.5% 0.041 273.3)
-
Step 300
300
#B1BEF2
oklch(81% 0.075 273.7)
-
Step 400
400
#8A9AEB
oklch(70.7% 0.12 274.4)
-
Step 500
500
#6E7FE5
oklch(63.1% 0.154 274.1)
-
Step 600
600
#5866D3
oklch(55.6% 0.167 274.2)
-
Step 700
700
#4854B7
oklch(49.1% 0.155 274)
-
Step 800
800 (this color)
#363F8D
oklch(40.5% 0.128 274.2)
-
Step 900
900
#323B76
oklch(37.7% 0.1 274.1)
-
Step 950
950
#1D2345
oklch(27% 0.063 273.9)
#363F8D 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) | #0B4B90 | 0.044 |
| Deuteranopia (no green cones) | #00438B | 0.044 |
| Tritanopia (no blue cones) | #00515F | 0.111 |
| Achromatopsia (no color) | #474747 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #363F8D
#363F8D
oklch(40.5% 0.128 274.2)
- #584800
#584800
oklch(40.6% 0.083 94.4)
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 #363F8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.028
- Blueberry #464196 ΔE 0.029
- Cobalt #1E488F ΔE 0.032
- Twilight Blue #0A437A ΔE 0.054
- Dusk Blue #26538D ΔE 0.056
- Light Navy #155084 ΔE 0.057
- Sapphire #2138AB ΔE 0.059
- Twilight #4E518B ΔE 0.065
Use #363F8D 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.