#3C428B
Closest named color: Dark Slate Blue (#483D8B). oklch(41.4% 0.12 276.3), rgb(60, 66, 139).
Aa
White text reads best on this color (8.95:1).
About this color
#3C428B is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.120 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.021 away. White text reads best on it, at 8.95:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.34:1 |
| White text | 8.95:1 |
Values
| HEX | #3C428B |
| RGB | rgb(60, 66, 139) |
| HSL | hsl(235, 40%, 39%) |
| OKLCH | oklch(41.4% 0.12 276.3) |
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 #3C428B | 8.95:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #3C428B | 2.34:1 | Fails | Lc 13.7 | Not readable |
| #3C428B text on white | 8.95:1 | AAA | Lc 90.3 | Preferred for body text |
| #3C428B text on black | 2.34:1 | Fails | Lc -12.0 | 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
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D2D8F3
oklch(88.6% 0.038 275.7)
-
Step 300
300
#B4BDEE
oklch(80.8% 0.07 276.6)
-
Step 400
400
#8E9AE6
oklch(70.7% 0.112 276.3)
-
Step 500
500
#747FDE
oklch(63.1% 0.142 276.5)
-
Step 600
600
#5D66CC
oklch(55.5% 0.156 276.3)
-
Step 700
700
#4D54B1
oklch(49% 0.146 276.4)
-
Step 800
800 (this color)
#3C428B
oklch(41.4% 0.12 276.3)
-
Step 900
900
#353B72
oklch(37.6% 0.093 276.3)
-
Step 950
950
#1F2343
oklch(27% 0.059 276.3)
#3C428B 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) | #1C4D8E | 0.042 |
| Deuteranopia (no green cones) | #0F4689 | 0.045 |
| Tritanopia (no blue cones) | #135260 | 0.104 |
| Achromatopsia (no color) | #494949 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C428B
#3C428B
oklch(41.4% 0.12 276.3)
- #594B00
#594B00
oklch(41.5% 0.085 96.8)
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 #3C428B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.021
- Blueberry #464196 ΔE 0.024
- Cobalt #1E488F ΔE 0.035
- Dusk Blue #26538D ΔE 0.050
- Twilight #4E518B ΔE 0.053
- Light Navy #155084 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.058
- Dusk #4E5481 ΔE 0.065
Use #3C428B 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.