#3A417E
Closest named color: Dark Slate Blue (#483D8B). oklch(40.2% 0.102 275.9), rgb(58, 65, 126).
Aa
White text reads best on this color (9.38:1).
About this color
#3A417E is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.102 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.033 away. White text reads best on it, at 9.38:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.38:1 |
Values
| HEX | #3A417E |
| RGB | rgb(58, 65, 126) |
| HSL | hsl(234, 37%, 36%) |
| OKLCH | oklch(40.2% 0.102 275.9) |
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 #3A417E | 9.38:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #3A417E | 2.23:1 | Fails | Lc 12.4 | Not readable |
| #3A417E text on white | 9.38:1 | AAA | Lc 91.5 | Preferred for body text |
| #3A417E text on black | 2.23:1 | Fails | Lc -10.8 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D7F6
oklch(88.4% 0.043 276.8)
-
Step 300
300
#B3BDF2
oklch(80.9% 0.076 276.3)
-
Step 400
400
#8C99EC
oklch(70.7% 0.122 276)
-
Step 500
500
#717EE6
oklch(63.2% 0.155 275.7)
-
Step 600
600
#5B64D4
oklch(55.5% 0.17 275.9)
-
Step 700
700
#4B52B8
oklch(49% 0.159 275.9)
-
Step 800
800
#3E4495
oklch(42.7% 0.131 276.2)
-
Step 900
900 (this color)
#3A417E
oklch(40.2% 0.102 275.9)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#3A417E 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) | #264980 | 0.030 |
| Deuteranopia (no green cones) | #1F447D | 0.032 |
| Tritanopia (no blue cones) | #1C4E59 | 0.090 |
| Achromatopsia (no color) | #464646 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A417E
#3A417E
oklch(40.2% 0.102 275.9)
- #564700
#564700
oklch(40.2% 0.082 95.2)
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 #3A417E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Cobalt #1E488F ΔE 0.042
- Blueberry #464196 ΔE 0.044
- Twilight Blue #0A437A ΔE 0.047
- Light Navy #155084 ΔE 0.051
- Dusk Blue #26538D ΔE 0.054
- Twilight #4E518B ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.064
Use #3A417E 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.