#3C437D
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.097 276), rgb(60, 67, 125).
Aa
White text reads best on this color (9.16:1).
About this color
#3C437D is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.097 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.035 away. White text reads best on it, at 9.16:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #3C437D |
| RGB | rgb(60, 67, 125) |
| HSL | hsl(234, 35%, 36%) |
| OKLCH | oklch(40.7% 0.097 276) |
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 #3C437D | 9.16:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #3C437D | 2.29:1 | Fails | Lc 13.0 | Not readable |
| #3C437D text on white | 9.16:1 | AAA | Lc 91.0 | Preferred for body text |
| #3C437D text on black | 2.29:1 | Fails | Lc -11.4 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D3D8EE
oklch(88.5% 0.031 275.6)
-
Step 300
300
#B6BEE6
oklch(80.9% 0.057 276.2)
-
Step 400
400
#919CD9
oklch(70.7% 0.09 276)
-
Step 500
500
#7782CF
oklch(63.1% 0.116 276.4)
-
Step 600
600
#606BBC
oklch(55.7% 0.126 275.7)
-
Step 700
700
#5059A2
oklch(49.2% 0.116 276)
-
Step 800
800 (this color)
#3C437D
oklch(40.7% 0.097 276)
-
Step 900
900
#373D69
oklch(37.6% 0.075 276.3)
-
Step 950
950
#20243E
oklch(27% 0.049 276)
#3C437D 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) | #2B4B7F | 0.029 |
| Deuteranopia (no green cones) | #25457C | 0.029 |
| Tritanopia (no blue cones) | #224F5A | 0.084 |
| Achromatopsia (no color) | #484848 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C437D
#3C437D
oklch(40.7% 0.097 276)
- #574900
#574900
oklch(40.8% 0.084 96.5)
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 #3C437D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.035
- Cobalt #1E488F ΔE 0.043
- Blueberry #464196 ΔE 0.045
- Light Navy #155084 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.050
- Dusk Blue #26538D ΔE 0.051
- Twilight #4E518B ΔE 0.054
- Dusk #4E5481 ΔE 0.059
Use #3C437D 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.