#363778
Closest named color: Dark Slate Blue (#483D8B). oklch(37.3% 0.108 279.1), rgb(54, 55, 120).
Aa
White text reads best on this color (10.63:1).
About this color
#363778 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.108 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.047 away. White text reads best on it, at 10.63:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.97:1 |
| White text | 10.63:1 |
Values
| HEX | #363778 |
| RGB | rgb(54, 55, 120) |
| HSL | hsl(239, 38%, 34%) |
| OKLCH | oklch(37.3% 0.108 279.1) |
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 #363778 | 10.63:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #363778 | 1.97:1 | Fails | Lc 9.5 | Not readable |
| #363778 text on white | 10.63:1 | AAA | Lc 94.4 | Preferred for body text |
| #363778 text on black | 1.97:1 | Fails | Lc -8.1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D2D7F7
oklch(88.5% 0.044 278.4)
-
Step 300
300
#B5BCF5
oklch(81% 0.081 279)
-
Step 400
400
#9097F0
oklch(70.8% 0.13 279.1)
-
Step 500
500
#767AEB
oklch(63.1% 0.167 279)
-
Step 600
600
#6160D9
oklch(55.6% 0.181 279.1)
-
Step 700
700
#514FBC
oklch(49.2% 0.167 279.1)
-
Step 800
800
#424198
oklch(42.7% 0.139 279.3)
-
Step 900
900 (this color)
#363778
oklch(37.3% 0.108 279.1)
-
Step 950
950
#202147
oklch(26.9% 0.069 279.5)
#363778 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) | #15417A | 0.043 |
| Deuteranopia (no green cones) | #0C3C77 | 0.045 |
| Tritanopia (no blue cones) | #194652 | 0.095 |
| Achromatopsia (no color) | #3E3E3E | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #363778
#363778
oklch(37.3% 0.108 279.1)
- #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 #363778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.047
- Twilight Blue #0A437A ΔE 0.050
- Cobalt #1E488F ΔE 0.059
- Marine Blue #01386A ΔE 0.059
- Blueberry #464196 ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.069
- Light Navy #155084 ΔE 0.073
- Dark Grey Blue #29465B ΔE 0.076
Use #363778 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.