#3C408C
Closest named color: Dark Slate Blue (#483D8B). oklch(41.1% 0.124 277.2), rgb(60, 64, 140).
Aa
White text reads best on this color (9.11:1).
About this color
#3C408C is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.124 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.019 away. White text reads best on it, at 9.11:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #3C408C |
| RGB | rgb(60, 64, 140) |
| HSL | hsl(237, 40%, 39%) |
| OKLCH | oklch(41.1% 0.124 277.2) |
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 #3C408C | 9.11:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #3C408C | 2.30:1 | Fails | Lc 13.2 | Not readable |
| #3C408C text on white | 9.11:1 | AAA | Lc 90.7 | Preferred for body text |
| #3C408C text on black | 2.30:1 | Fails | Lc -11.6 | 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 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
#D2D7F4
oklch(88.4% 0.04 277.8)
-
Step 300
300
#B4BDF0
oklch(80.9% 0.073 276.8)
-
Step 400
400
#8F99E8
oklch(70.7% 0.116 277.5)
-
Step 500
500
#757EE1
oklch(63.1% 0.148 277.4)
-
Step 600
600
#5F65CF
oklch(55.6% 0.161 277.4)
-
Step 700
700
#4E53B3
oklch(49% 0.15 277.1)
-
Step 800
800 (this color)
#3C408C
oklch(41.1% 0.124 277.2)
-
Step 900
900
#363A74
oklch(37.6% 0.098 277.6)
-
Step 950
950
#1F2344
oklch(27.1% 0.061 276.3)
#3C408C 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) | #144C8F | 0.047 |
| Deuteranopia (no green cones) | #03458A | 0.050 |
| Tritanopia (no blue cones) | #12515F | 0.108 |
| Achromatopsia (no color) | #484848 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C408C
#3C408C
oklch(41.1% 0.124 277.2)
- #584A00
#584A00
oklch(41.1% 0.085 96.6)
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 #3C408C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.019
- Blueberry #464196 ΔE 0.023
- Cobalt #1E488F ΔE 0.037
- Dusk Blue #26538D ΔE 0.055
- Twilight #4E518B ΔE 0.058
- Light Navy #155084 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.060
- Sapphire #2138AB ΔE 0.065
Use #3C408C 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.