#3B3A90
Closest named color: Dark Slate Blue (#483D8B). oklch(40.2% 0.138 278.7), rgb(59, 58, 144).
Aa
White text reads best on this color (9.57:1).
About this color
#3B3A90 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.138 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.025 away. White text reads best on it, at 9.57:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.57:1 |
Values
| HEX | #3B3A90 |
| RGB | rgb(59, 58, 144) |
| HSL | hsl(241, 43%, 40%) |
| OKLCH | oklch(40.2% 0.138 278.7) |
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 #3B3A90 | 9.57:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #3B3A90 | 2.19:1 | Fails | Lc 12.1 | Not readable |
| #3B3A90 text on white | 9.57:1 | AAA | Lc 91.8 | Preferred for body text |
| #3B3A90 text on black | 2.19:1 | Fails | Lc -10.6 | 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
#E5E8FE
oklch(93.5% 0.03 279.6)
-
Step 200
200
#D0D6FF
oklch(88.5% 0.057 278.6)
-
Step 300
300
#B2BBFF
oklch(81% 0.097 278.2)
-
Step 400
400
#8D94FF
oklch(70.8% 0.155 278.8)
-
Step 500
500
#7374FF
oklch(63.1% 0.202 278.6)
-
Step 600
600
#5E54F5
oklch(55.6% 0.231 278.5)
-
Step 700
700
#4F43D5
oklch(49.2% 0.214 278.7)
-
Step 800
800
#4038AC
oklch(42.6% 0.178 278.8)
-
Step 900
900 (this color)
#3B3A90
oklch(40.2% 0.138 278.7)
-
Step 950
950
#1F1F50
oklch(27.1% 0.088 278.8)
#3B3A90 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) | #004993 | 0.057 |
| Deuteranopia (no green cones) | #00428E | 0.053 |
| Tritanopia (no blue cones) | #064E5F | 0.119 |
| Achromatopsia (no color) | #454545 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3A90
#3B3A90
oklch(40.2% 0.138 278.7)
- #544800
#544800
oklch(40.2% 0.083 98.3)
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 #3B3A90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.025
- Blueberry #464196 ΔE 0.028
- Cobalt #1E488F ΔE 0.046
- Sapphire #2138AB ΔE 0.055
- Twilight Blue #0A437A ΔE 0.066
- Dusk Blue #26538D ΔE 0.069
- Light Navy #155084 ΔE 0.072
- Twilight #4E518B ΔE 0.073
Use #3B3A90 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.