#363779
Closest named color: Dark Slate Blue (#483D8B). oklch(37.4% 0.11 279), rgb(54, 55, 121).
Aa
White text reads best on this color (10.60:1).
About this color
#363779 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.110 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.046 away. White text reads best on it, at 10.60:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.97:1 |
| White text | 10.60:1 |
Values
| HEX | #363779 |
| RGB | rgb(54, 55, 121) |
| HSL | hsl(239, 38%, 34%) |
| OKLCH | oklch(37.4% 0.11 279) |
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 #363779 | 10.60:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #363779 | 1.97:1 | Fails | Lc 9.5 | Not readable |
| #363779 text on white | 10.60:1 | AAA | Lc 94.4 | Preferred for body text |
| #363779 text on black | 1.97:1 | Fails | Lc -8.2 | 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
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D2D7F8
oklch(88.6% 0.046 278.6)
-
Step 300
300
#B5BCF6
oklch(81% 0.082 279)
-
Step 400
400
#8F97F1
oklch(70.7% 0.131 278.6)
-
Step 500
500
#767AEC
oklch(63.1% 0.168 278.9)
-
Step 600
600
#6160DB
oklch(55.7% 0.183 279)
-
Step 700
700
#504EBE
oklch(49.1% 0.171 278.8)
-
Step 800
800
#424199
oklch(42.8% 0.14 279.2)
-
Step 900
900 (this color)
#363779
oklch(37.4% 0.11 279)
-
Step 950
950
#202147
oklch(26.9% 0.069 279.5)
#363779 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) | #13417B | 0.044 |
| Deuteranopia (no green cones) | #093C78 | 0.046 |
| Tritanopia (no blue cones) | #184652 | 0.096 |
| Achromatopsia (no color) | #3F3F3F | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #363779
#363779
oklch(37.4% 0.11 279)
- #4B4100
#4B4100
oklch(37.4% 0.078 99.4)
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 #363779, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Twilight Blue #0A437A ΔE 0.050
- Cobalt #1E488F ΔE 0.058
- Marine Blue #01386A ΔE 0.060
- Blueberry #464196 ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.070
- Light Navy #155084 ΔE 0.073
- Dark Grey Blue #29465B ΔE 0.077
Use #363779 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.