#33388D
Closest named color: Dark Slate Blue (#483D8B). oklch(38.9% 0.139 275.4), rgb(51, 56, 141).
Aa
White text reads best on this color (10.04:1).
About this color
#33388D is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.139 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.038 away. White text reads best on it, at 10.04:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.09:1 |
| White text | 10.04:1 |
Values
| HEX | #33388D |
| RGB | rgb(51, 56, 141) |
| HSL | hsl(237, 47%, 38%) |
| OKLCH | oklch(38.9% 0.139 275.4) |
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 #33388D | 10.04:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #33388D | 2.09:1 | Fails | Lc 11.0 | Not readable |
| #33388D text on white | 10.04:1 | AAA | Lc 92.9 | Preferred for body text |
| #33388D text on black | 2.09:1 | Fails | Lc -9.5 | 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
#E4E9FF
oklch(93.7% 0.03 275.6)
-
Step 200
200
#CED7FF
oklch(88.5% 0.056 275.2)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400
#8696FF
oklch(70.7% 0.154 275.2)
-
Step 500
500
#6B77FF
oklch(63.1% 0.199 275.3)
-
Step 600
600
#5557F6
oklch(55.5% 0.231 275.3)
-
Step 700
700
#4746D7
oklch(49.2% 0.215 275.4)
-
Step 800
800
#393BAD
oklch(42.7% 0.177 275.1)
-
Step 900
900 (this color)
#33388D
oklch(38.9% 0.139 275.4)
-
Step 950
950
#1C2050
oklch(27.1% 0.087 275.4)
#33388D 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) | #004690 | 0.049 |
| Deuteranopia (no green cones) | #003E8B | 0.043 |
| Tritanopia (no blue cones) | #004D5D | 0.117 |
| Achromatopsia (no color) | #424242 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33388D
#33388D
oklch(38.9% 0.139 275.4)
- #524400
#524400
oklch(39% 0.08 95.7)
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 #33388D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.038
- Blueberry #464196 ΔE 0.042
- Cobalt #1E488F ΔE 0.044
- Sapphire #2138AB ΔE 0.053
- Twilight Blue #0A437A ΔE 0.057
- Light Navy #155084 ΔE 0.071
- Dusk Blue #26538D ΔE 0.073
- Indigo Blue #3A18B1 ΔE 0.077
Use #33388D 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.