#3A3D89
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.124 277.5), rgb(58, 61, 137).
Aa
White text reads best on this color (9.50:1).
About this color
#3A3D89 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.124 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.023 away. White text reads best on it, at 9.50:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.20:1 |
| White text | 9.50:1 |
Values
| HEX | #3A3D89 |
| RGB | rgb(58, 61, 137) |
| HSL | hsl(238, 41%, 38%) |
| OKLCH | oklch(40.1% 0.124 277.5) |
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 #3A3D89 | 9.50:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #3A3D89 | 2.20:1 | Fails | Lc 12.2 | Not readable |
| #3A3D89 text on white | 9.50:1 | AAA | Lc 91.7 | Preferred for body text |
| #3A3D89 text on black | 2.20:1 | Fails | Lc -10.7 | 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
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FC
oklch(88.6% 0.052 276.9)
-
Step 300
300
#B2BBFD
oklch(80.9% 0.094 278.1)
-
Step 400
400
#8B95FC
oklch(70.7% 0.15 277.6)
-
Step 500
500
#7177F9
oklch(63.1% 0.19 277.5)
-
Step 600
600
#5C5BE8
oklch(55.5% 0.207 277.6)
-
Step 700
700
#4D4ACA
oklch(49.2% 0.192 277.7)
-
Step 800
800
#3E3EA3
oklch(42.7% 0.159 277.3)
-
Step 900
900 (this color)
#3A3D89
oklch(40.1% 0.124 277.5)
-
Step 950
950
#1E204C
oklch(26.9% 0.08 277.6)
#3A3D89 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) | #0E498C | 0.049 |
| Deuteranopia (no green cones) | #004287 | 0.051 |
| Tritanopia (no blue cones) | #0F4E5D | 0.107 |
| Achromatopsia (no color) | #464646 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A3D89
#3A3D89
oklch(40.1% 0.124 277.5)
- #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 #3A3D89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.023
- Blueberry #464196 ΔE 0.031
- Cobalt #1E488F ΔE 0.040
- Twilight Blue #0A437A ΔE 0.056
- Dusk Blue #26538D ΔE 0.061
- Light Navy #155084 ΔE 0.062
- Sapphire #2138AB ΔE 0.066
- Twilight #4E518B ΔE 0.066
Use #3A3D89 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.