#333584
Closest named color: Dark Slate Blue (#483D8B). oklch(37.6% 0.13 277.1), rgb(51, 53, 132).
Aa
White text reads best on this color (10.58:1).
About this color
#333584 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.130 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.043 away. White text reads best on it, at 10.58:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.98:1 |
| White text | 10.58:1 |
Values
| HEX | #333584 |
| RGB | rgb(51, 53, 132) |
| HSL | hsl(239, 44%, 36%) |
| OKLCH | oklch(37.6% 0.13 277.1) |
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 #333584 | 10.58:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #333584 | 1.98:1 | Fails | Lc 9.7 | Not readable |
| #333584 text on white | 10.58:1 | AAA | Lc 94.2 | Preferred for body text |
| #333584 text on black | 1.98:1 | Fails | Lc -8.4 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FD
oklch(93.7% 0.027 276.8)
-
Step 200
200
#D0D7FD
oklch(88.6% 0.053 277)
-
Step 300
300
#B0BBFF
oklch(80.8% 0.097 276.9)
-
Step 400
400
#8A95FF
oklch(70.7% 0.154 277.2)
-
Step 500
500
#6F76FE
oklch(63.1% 0.199 276.9)
-
Step 600
600
#5B5AED
oklch(55.7% 0.215 277.1)
-
Step 700
700
#4B48CF
oklch(49.1% 0.202 277)
-
Step 800
800
#3D3CA7
oklch(42.6% 0.167 277)
-
Step 900
900 (this color)
#333584
oklch(37.6% 0.13 277.1)
-
Step 950
950
#1E204D
oklch(27% 0.081 277.5)
#333584 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) | #004287 | 0.050 |
| Deuteranopia (no green cones) | #003B82 | 0.046 |
| Tritanopia (no blue cones) | #004857 | 0.112 |
| Achromatopsia (no color) | #3F3F3F | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333584
#333584
oklch(37.6% 0.13 277.1)
- #4D4100
#4D4100
oklch(37.6% 0.078 97.3)
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 #333584, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Cobalt #1E488F ΔE 0.053
- Blueberry #464196 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.054
- Marine Blue #01386A ΔE 0.067
- Sapphire #2138AB ΔE 0.068
- Light Navy #155084 ΔE 0.076
- Dusk Blue #26538D ΔE 0.081
Use #333584 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.