#3C4289
Closest named color: Dark Slate Blue (#483D8B). oklch(41.3% 0.117 276.4), rgb(60, 66, 137).
Aa
White text reads best on this color (9.00:1).
About this color
#3C4289 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.117 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.022 away. White text reads best on it, at 9.00:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #3C4289 |
| RGB | rgb(60, 66, 137) |
| HSL | hsl(235, 39%, 39%) |
| OKLCH | oklch(41.3% 0.117 276.4) |
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 #3C4289 | 9.00:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #3C4289 | 2.33:1 | Fails | Lc 13.5 | Not readable |
| #3C4289 text on white | 9.00:1 | AAA | Lc 90.5 | Preferred for body text |
| #3C4289 text on black | 2.33:1 | Fails | Lc -11.8 | 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 800.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F3
oklch(88.6% 0.038 275.7)
-
Step 300
300
#B4BDED
oklch(80.8% 0.069 276.5)
-
Step 400
400
#8F9AE4
oklch(70.7% 0.109 276.8)
-
Step 500
500
#747FDC
oklch(63% 0.139 276.5)
-
Step 600
600
#5E67CA
oklch(55.6% 0.151 276.4)
-
Step 700
700
#4E55AF
oklch(49.1% 0.141 276.5)
-
Step 800
800 (this color)
#3C4289
oklch(41.3% 0.117 276.4)
-
Step 900
900
#363B71
oklch(37.6% 0.092 277.1)
-
Step 950
950
#1F2342
oklch(26.9% 0.058 276.3)
#3C4289 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) | #1E4C8C | 0.039 |
| Deuteranopia (no green cones) | #134687 | 0.043 |
| Tritanopia (no blue cones) | #16525F | 0.102 |
| Achromatopsia (no color) | #494949 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C4289
#3C4289
oklch(41.3% 0.117 276.4)
- #594A00
#594A00
oklch(41.2% 0.085 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 #3C4289, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.022
- Blueberry #464196 ΔE 0.027
- Cobalt #1E488F ΔE 0.036
- Dusk Blue #26538D ΔE 0.050
- Twilight #4E518B ΔE 0.053
- Light Navy #155084 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.057
- Dusk #4E5481 ΔE 0.064
Use #3C4289 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.